5 // Marek Safar (marek.safar@gmail.com)
6 // Alejandro Serrano "Serras" (trupill@yahoo.es)
7 // Jb Evain (jbevain@novell.com)
8 // Andreas Noever (andreas.noever@gmail.com)
10 // Copyright (C) 2008 Novell, Inc (http://www.novell.com)
12 // Permission is hereby granted, free of charge, to any person obtaining
13 // a copy of this software and associated documentation files (the
14 // "Software"), to deal in the Software without restriction, including
15 // without limitation the rights to use, copy, modify, merge, publish,
16 // distribute, sublicense, and/or sell copies of the Software, and to
17 // permit persons to whom the Software is furnished to do so, subject to
18 // the following conditions:
20 // The above copyright notice and this permission notice shall be
21 // included in all copies or substantial portions of the Software.
23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
33 using System.Collections;
34 using System.Collections.Generic;
35 using System.Linq.Expressions;
36 using System.Reflection;
39 namespace System.Linq {
41 public static class Queryable {
43 static MethodInfo MakeGeneric (MethodBase method, params Type [] parameters)
45 return ((MethodInfo) method).MakeGenericMethod (parameters);
48 static Expression StaticCall (MethodInfo method, params Expression [] expressions)
50 return Expression.Call (null, method, expressions);
53 static TRet Execute<TRet, TSource> (this IQueryable<TSource> source, MethodBase current)
55 return source.Provider.Execute<TRet> (
57 MakeGeneric (current, typeof (TSource)),
63 public static TSource Aggregate<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, TSource, TSource>> func)
65 Check.SourceAndFunc (source, func);
66 return source.Provider.Execute<TSource> (
68 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
70 Expression.Quote (func)));
73 public static TAccumulate Aggregate<TSource, TAccumulate> (this IQueryable<TSource> source, TAccumulate seed, Expression<Func<TAccumulate, TSource, TAccumulate>> func)
75 Check.SourceAndFunc (source, func);
76 return source.Provider.Execute<TAccumulate> (
78 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TAccumulate)),
80 Expression.Constant (seed, typeof (TAccumulate)),
81 Expression.Quote (func)));
84 public static TResult Aggregate<TSource, TAccumulate, TResult> (this IQueryable<TSource> source, TAccumulate seed, Expression<Func<TAccumulate, TSource, TAccumulate>> func, Expression<Func<TAccumulate, TResult>> selector)
86 Check.SourceAndFuncAndSelector (source, func, selector);
87 return source.Provider.Execute<TResult> (
89 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TAccumulate), typeof (TResult)),
91 Expression.Constant (seed, typeof (TAccumulate)),
92 Expression.Quote (func),
93 Expression.Quote (selector)));
100 public static bool All<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
102 Check.SourceAndPredicate (source, predicate);
104 return source.Provider.Execute<bool> (
106 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
108 Expression.Quote (predicate)));
115 public static bool Any<TSource> (this IQueryable<TSource> source)
117 Check.Source (source);
119 return source.Provider.Execute<bool> (
121 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
125 public static bool Any<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
127 Check.SourceAndPredicate (source, predicate);
129 return source.Provider.Execute<bool> (
131 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
133 Expression.Quote (predicate)));
140 public static IQueryable<TElement> AsQueryable<TElement> (this IEnumerable<TElement> source)
143 throw new ArgumentNullException ("source");
145 var queryable = source as IQueryable<TElement>;
146 if (queryable != null)
149 return new QueryableEnumerable<TElement> (source);
152 public static IQueryable AsQueryable (this IEnumerable source)
155 throw new ArgumentNullException ("source");
157 var queryable = source as IQueryable;
158 if (queryable != null)
161 var type = source.GetType ();
163 if (!type.IsGenericImplementationOf (typeof (IEnumerable<>)))
164 throw new ArgumentException ("source is not IEnumerable<>");
166 return (IQueryable) Activator.CreateInstance (
167 typeof (QueryableEnumerable<>).MakeGenericType (type.GetFirstGenericArgument ()), source);
174 public static double Average (this IQueryable<int> source)
176 Check.Source (source);
178 return source.Provider.Execute<double>(
180 (MethodInfo) MethodBase.GetCurrentMethod (),
184 public static double? Average(this IQueryable<int?> source)
186 Check.Source (source);
188 return source.Provider.Execute<double?>(
190 (MethodInfo) MethodBase.GetCurrentMethod (),
194 public static double Average(this IQueryable<long> source)
196 Check.Source (source);
198 return source.Provider.Execute<double>(
200 (MethodInfo) MethodBase.GetCurrentMethod (),
204 public static double? Average(this IQueryable<long?> source)
206 Check.Source (source);
208 return source.Provider.Execute<double?>(
210 (MethodInfo) MethodBase.GetCurrentMethod (),
214 public static float Average(this IQueryable<float> source)
216 Check.Source (source);
218 return source.Provider.Execute<float>(
220 (MethodInfo) MethodBase.GetCurrentMethod (),
224 public static float? Average(this IQueryable<float?> source)
226 Check.Source (source);
228 return source.Provider.Execute<float?>(
230 (MethodInfo) MethodBase.GetCurrentMethod (),
234 public static double Average (this IQueryable<double> source)
236 Check.Source (source);
238 return source.Provider.Execute<double> (
240 (MethodInfo) MethodBase.GetCurrentMethod (),
244 public static double? Average (this IQueryable<double?> source)
246 Check.Source (source);
248 return source.Provider.Execute<double?> (
250 (MethodInfo) MethodBase.GetCurrentMethod (),
254 public static decimal Average(this IQueryable<decimal> source)
256 Check.Source (source);
258 return source.Provider.Execute<decimal>(
260 (MethodInfo) MethodBase.GetCurrentMethod (),
264 public static decimal? Average(this IQueryable<decimal?> source)
266 Check.Source (source);
268 return source.Provider.Execute<decimal?>(
270 (MethodInfo) MethodBase.GetCurrentMethod (),
274 public static double Average<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, int>> selector)
276 Check.SourceAndSelector (source, selector);
278 return source.Provider.Execute<double>(
280 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
282 Expression.Quote (selector)));
285 public static double? Average<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, int?>> selector)
287 Check.SourceAndSelector (source, selector);
289 return source.Provider.Execute<double?>(
291 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
293 Expression.Quote (selector)));
296 public static double Average<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, long>> selector)
298 Check.SourceAndSelector (source, selector);
300 return source.Provider.Execute<double>(
302 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
304 Expression.Quote (selector)));
307 public static double? Average<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, long?>> selector)
309 Check.SourceAndSelector (source, selector);
311 return source.Provider.Execute<double?>(
313 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
315 Expression.Quote (selector)));
318 public static float Average<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, float>> selector)
320 Check.SourceAndSelector (source, selector);
322 return source.Provider.Execute<float>(
324 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
326 Expression.Quote (selector)));
329 public static float? Average<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, float?>> selector)
331 Check.SourceAndSelector (source, selector);
333 return source.Provider.Execute<float?>(
335 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
337 Expression.Quote (selector)));
340 public static double Average<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, double>> selector)
342 Check.SourceAndSelector (source, selector);
344 return source.Provider.Execute<double> (
346 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
348 Expression.Quote (selector)));
351 public static double? Average<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, double?>> selector)
353 Check.SourceAndSelector (source, selector);
355 return source.Provider.Execute<double?> (
357 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
359 Expression.Quote (selector)));
362 public static decimal Average<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, decimal>> selector)
364 Check.SourceAndSelector (source, selector);
366 return source.Provider.Execute<decimal>(
368 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
370 Expression.Quote (selector)));
373 public static decimal? Average<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, decimal?>> selector)
375 Check.SourceAndSelector (source, selector);
377 return source.Provider.Execute<decimal?>(
379 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
381 Expression.Quote (selector)));
388 public static IQueryable<TResult> Cast<TResult> (this IQueryable source)
390 Check.Source (source);
392 return (IQueryable<TResult>) source.Provider.CreateQuery (
393 StaticCall (MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TResult)),
401 public static IQueryable<TSource> Concat<TSource> (this IQueryable<TSource> source1, IEnumerable<TSource> source2)
403 Check.Source1AndSource2 (source1, source2);
405 return source1.Provider.CreateQuery<TSource> (
407 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
409 Expression.Constant (source2, typeof (IEnumerable<TSource>))));
416 public static bool Contains<TSource> (this IQueryable<TSource> source, TSource item)
418 Check.Source (source);
420 return source.Provider.Execute<bool> (
422 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
424 Expression.Constant (item, typeof (TSource))));
427 public static bool Contains<TSource> (this IQueryable<TSource> source, TSource item, IEqualityComparer<TSource> comparer)
429 Check.Source (source);
431 return source.Provider.Execute<bool> (
433 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
435 Expression.Constant (item, typeof (TSource)),
436 Expression.Constant (comparer, typeof (IEqualityComparer<TSource>))));
443 public static int Count<TSource> (this IQueryable<TSource> source)
445 Check.Source (source);
447 return source.Execute<int, TSource> (MethodBase.GetCurrentMethod ());
450 public static int Count<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
452 Check.SourceAndPredicate (source, predicate);
454 return source.Provider.Execute<int> (
456 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
458 Expression.Quote (predicate)));
463 #region DefaultIfEmpty
465 public static IQueryable<TSource> DefaultIfEmpty<TSource> (this IQueryable<TSource> source)
467 Check.Source (source);
469 return source.Provider.CreateQuery<TSource> (
471 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
475 public static IQueryable<TSource> DefaultIfEmpty<TSource> (this IQueryable<TSource> source, TSource defaultValue)
477 Check.Source (source);
479 return source.Provider.CreateQuery<TSource> (
481 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
483 Expression.Constant (defaultValue, typeof (TSource))));
490 public static IQueryable<TSource> Distinct<TSource> (this IQueryable<TSource> source)
492 Check.Source (source);
494 return source.Provider.CreateQuery<TSource> (
496 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
500 public static IQueryable<TSource> Distinct<TSource> (this IQueryable<TSource> source, IEqualityComparer<TSource> comparer)
502 Check.Source (source);
504 return source.Provider.CreateQuery<TSource> (
506 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
508 Expression.Constant (comparer, typeof (IEqualityComparer<TSource>))));
515 public static TSource ElementAt<TSource> (this IQueryable<TSource> source, int index)
517 Check.Source (source);
519 return source.Provider.Execute<TSource> (
521 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
523 Expression.Constant (index)));
528 #region ElementAtOrDefault
530 public static TSource ElementAtOrDefault<TSource> (this IQueryable<TSource> source, int index)
532 Check.Source (source);
534 return source.Provider.Execute<TSource> (
536 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
538 Expression.Constant (index)));
545 public static IQueryable<TSource> Except<TSource> (this IQueryable<TSource> source1, IEnumerable<TSource> source2)
547 Check.Source1AndSource2 (source1, source2);
549 return source1.Provider.CreateQuery<TSource> (
551 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
553 Expression.Constant (source2, typeof (IEnumerable<TSource>))));
556 public static IQueryable<TSource> Except<TSource> (this IQueryable<TSource> source1, IEnumerable<TSource> source2, IEqualityComparer<TSource> comparer)
558 Check.Source1AndSource2 (source1, source2);
560 return source1.Provider.CreateQuery<TSource> (
562 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
564 Expression.Constant (source2, typeof (IEnumerable<TSource>)),
565 Expression.Constant (comparer, typeof (IEqualityComparer<TSource>))));
572 public static TSource First<TSource> (this IQueryable<TSource> source)
574 Check.Source (source);
576 return source.Provider.Execute<TSource> (
578 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
582 public static TSource First<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
584 Check.SourceAndPredicate (source, predicate);
586 return source.Provider.Execute<TSource> (
588 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
590 Expression.Quote (predicate)));
595 #region FirstOrDefault
597 public static TSource FirstOrDefault<TSource> (this IQueryable<TSource> source)
599 Check.Source (source);
601 return source.Provider.Execute<TSource> (
603 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
607 public static TSource FirstOrDefault<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
609 Check.SourceAndPredicate (source, predicate);
611 return source.Provider.Execute<TSource> (
613 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
615 Expression.Quote (predicate)));
622 public static IQueryable<IGrouping<TKey, TSource>> GroupBy<TSource, TKey> (this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector)
624 Check.SourceAndKeySelector (source, keySelector);
626 return source.Provider.CreateQuery<IGrouping<TKey, TSource>> (
628 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey)),
630 Expression.Quote (keySelector)));
632 public static IQueryable<IGrouping<TKey, TSource>> GroupBy<TSource, TKey> (this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector, IEqualityComparer<TKey> comparer)
634 Check.SourceAndKeySelector (source, keySelector);
636 return source.Provider.CreateQuery<IGrouping<TKey, TSource>> (
638 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey)),
640 Expression.Quote (keySelector),
641 Expression.Constant (comparer, typeof (IEqualityComparer<TKey>))));
643 public static IQueryable<IGrouping<TKey, TElement>> GroupBy<TSource, TKey, TElement> (this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector, Expression<Func<TSource, TElement>> elementSelector)
645 Check.SourceAndKeyElementSelectors (source, keySelector, elementSelector);
647 return source.Provider.CreateQuery<IGrouping<TKey, TElement>>(
649 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey), typeof (TElement)),
651 Expression.Quote (keySelector),
652 Expression.Quote (elementSelector)));
654 public static IQueryable<TResult> GroupBy<TSource, TKey, TResult> (this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector, Expression<Func<TKey, IEnumerable<TSource>, TResult>> resultSelector)
656 Check.SourceAndKeyResultSelectors (source, keySelector, resultSelector);
658 return source.Provider.CreateQuery<TResult> (
660 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey), typeof (TResult)),
662 Expression.Quote (keySelector),
663 Expression.Quote (resultSelector)));
665 public static IQueryable<IGrouping<TKey, TElement>> GroupBy<TSource, TKey, TElement> (this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector, Expression<Func<TSource, TElement>> elementSelector, IEqualityComparer<TKey> comparer)
667 Check.SourceAndKeyElementSelectors (source, keySelector, elementSelector);
669 return source.Provider.CreateQuery<IGrouping<TKey, TElement>> (
671 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey), typeof (TElement)),
673 Expression.Quote (keySelector),
674 Expression.Quote (elementSelector),
675 Expression.Constant (comparer, typeof (IEqualityComparer<TKey>))));
677 public static IQueryable<TResult> GroupBy<TSource, TKey, TElement, TResult> (this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector, Expression<Func<TSource, TElement>> elementSelector, Expression<Func<TKey, IEnumerable<TElement>, TResult>> resultSelector)
679 Check.GroupBySelectors (source, keySelector, elementSelector, resultSelector);
681 return source.Provider.CreateQuery<TResult> (
683 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey), typeof (TElement), typeof (TResult)),
685 Expression.Quote (keySelector),
686 Expression.Quote (elementSelector),
687 Expression.Quote (resultSelector)));
690 public static IQueryable<TResult> GroupBy<TSource, TKey, TResult> (this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector, Expression<Func<TKey, IEnumerable<TSource>, TResult>> resultSelector, IEqualityComparer<TKey> comparer)
692 Check.SourceAndKeyResultSelectors (source, keySelector, resultSelector);
694 return source.Provider.CreateQuery<TResult> (
696 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey), typeof (TResult)),
698 Expression.Quote (keySelector),
699 Expression.Quote (resultSelector),
700 Expression.Constant (comparer, typeof (IEqualityComparer<TKey>))));
702 public static IQueryable<TResult> GroupBy<TSource, TKey, TElement, TResult> (this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector, Expression<Func<TSource, TElement>> elementSelector, Expression<Func<TKey, IEnumerable<TElement>, TResult>> resultSelector, IEqualityComparer<TKey> comparer)
704 Check.GroupBySelectors (source, keySelector, elementSelector, resultSelector);
706 return source.Provider.CreateQuery<TResult> (
708 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey), typeof (TElement), typeof (TResult)),
710 Expression.Quote (keySelector),
711 Expression.Quote (elementSelector),
712 Expression.Quote (resultSelector),
713 Expression.Constant (comparer, typeof (IEqualityComparer<TKey>))));
719 public static IQueryable<TResult> GroupJoin<TOuter, TInner, TKey, TResult> (this IQueryable<TOuter> outer, IEnumerable<TInner> inner, Expression<Func<TOuter, TKey>> outerKeySelector, Expression<Func<TInner, TKey>> innerKeySelector, Expression<Func<TOuter, IEnumerable<TInner>, TResult>> resultSelector)
722 throw new ArgumentNullException ("outer");
724 throw new ArgumentNullException ("inner");
725 if (outerKeySelector == null)
726 throw new ArgumentNullException ("outerKeySelector");
727 if (innerKeySelector == null)
728 throw new ArgumentNullException ("innerKeySelector");
729 if (resultSelector == null)
730 throw new ArgumentNullException ("resultSelector");
732 return outer.Provider.CreateQuery<TResult> (
734 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TOuter), typeof (TInner), typeof (TKey), typeof (TResult)),
736 Expression.Constant (inner, typeof (IEnumerable<TInner>)),
737 Expression.Quote (outerKeySelector),
738 Expression.Quote (innerKeySelector),
739 Expression.Quote (resultSelector)));
742 public static IQueryable<TResult> GroupJoin<TOuter, TInner, TKey, TResult> (this IQueryable<TOuter> outer, IEnumerable<TInner> inner, Expression<Func<TOuter, TKey>> outerKeySelector, Expression<Func<TInner, TKey>> innerKeySelector, Expression<Func<TOuter, IEnumerable<TInner>, TResult>> resultSelector, IEqualityComparer<TKey> comparer)
745 throw new ArgumentNullException ("outer");
747 throw new ArgumentNullException ("inner");
748 if (outerKeySelector == null)
749 throw new ArgumentNullException ("outerKeySelector");
750 if (innerKeySelector == null)
751 throw new ArgumentNullException ("innerKeySelector");
752 if (resultSelector == null)
753 throw new ArgumentNullException ("resultSelector");
755 return outer.Provider.CreateQuery<TResult> (
757 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TOuter), typeof (TInner), typeof (TKey), typeof (TResult)),
759 Expression.Constant (inner, typeof (IEnumerable<TInner>)),
760 Expression.Quote (outerKeySelector),
761 Expression.Quote (innerKeySelector),
762 Expression.Quote (resultSelector),
763 Expression.Constant (comparer)));
770 public static IQueryable<TSource> Intersect<TSource> (this IQueryable<TSource> source1, IEnumerable<TSource> source2)
772 Check.Source1AndSource2 (source1, source2);
774 return source1.Provider.CreateQuery<TSource> (
776 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
778 Expression.Constant (source2, typeof (IEnumerable<TSource>))));
781 public static IQueryable<TSource> Intersect<TSource> (this IQueryable<TSource> source1, IEnumerable<TSource> source2, IEqualityComparer<TSource> comparer)
783 Check.Source1AndSource2 (source1, source2);
785 return source1.Provider.CreateQuery<TSource> (
787 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
789 Expression.Constant (source2, typeof (IEnumerable<TSource>)),
790 Expression.Constant (comparer, typeof (IEqualityComparer<TSource>))));
797 public static IQueryable<TResult> Join<TOuter, TInner, TKey, TResult> (this IQueryable<TOuter> outer, IEnumerable<TInner> inner, Expression<Func<TOuter, TKey>> outerKeySelector, Expression<Func<TInner, TKey>> innerKeySelector, Expression<Func<TOuter, TInner, TResult>> resultSelector)
799 Check.JoinSelectors (outer, inner, outerKeySelector, innerKeySelector, resultSelector);
801 return outer.Provider.CreateQuery<TResult> (
803 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TOuter), typeof (TInner), typeof (TKey), typeof (TResult)),
805 Expression.Constant (inner, typeof (IEnumerable<TInner>)),
806 Expression.Quote (outerKeySelector),
807 Expression.Quote (innerKeySelector),
808 Expression.Quote (resultSelector)));
811 public static IQueryable<TResult> Join<TOuter, TInner, TKey, TResult> (this IQueryable<TOuter> outer, IEnumerable<TInner> inner, Expression<Func<TOuter, TKey>> outerKeySelector, Expression<Func<TInner, TKey>> innerKeySelector, Expression<Func<TOuter, TInner, TResult>> resultSelector, IEqualityComparer<TKey> comparer)
813 Check.JoinSelectors (outer, inner, outerKeySelector, innerKeySelector, resultSelector);
815 return outer.Provider.CreateQuery<TResult> (
817 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TOuter), typeof (TInner), typeof (TKey), typeof (TResult)),
819 Expression.Constant (inner, typeof (IEnumerable<TInner>)),
820 Expression.Quote (outerKeySelector),
821 Expression.Quote (innerKeySelector),
822 Expression.Quote (resultSelector),
823 Expression.Constant (comparer, typeof (IEqualityComparer<TKey>))));
831 public static TSource Last<TSource> (this IQueryable<TSource> source)
833 Check.Source (source);
835 return source.Provider.Execute<TSource> (
837 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
841 public static TSource Last<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
843 Check.SourceAndPredicate (source, predicate);
845 return source.Provider.Execute<TSource> (
847 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
849 Expression.Quote (predicate)));
854 #region LastOrDefault
856 public static TSource LastOrDefault<TSource> (this IQueryable<TSource> source)
858 Check.Source (source);
860 return source.Provider.Execute<TSource> (
862 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
866 public static TSource LastOrDefault<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
868 Check.SourceAndPredicate (source, predicate);
870 return source.Provider.Execute<TSource> (
872 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
874 Expression.Quote (predicate)));
881 public static long LongCount<TSource> (this IQueryable<TSource> source)
883 Check.Source (source);
885 return source.Execute<long, TSource> (MethodBase.GetCurrentMethod ());
888 public static long LongCount<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
890 Check.SourceAndPredicate (source, predicate);
892 return source.Provider.Execute<long> (
894 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
896 Expression.Quote (predicate)));
903 public static TSource Max<TSource> (this IQueryable<TSource> source)
905 Check.Source (source);
907 return source.Provider.Execute<TSource> (
909 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
913 public static TResult Max<TSource, TResult> (this IQueryable<TSource> source, Expression<Func<TSource, TResult>> selector)
915 Check.Source (source);
917 return source.Provider.Execute<TResult> (
919 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TResult)),
921 Expression.Quote (selector)));
929 public static TSource Min<TSource> (this IQueryable<TSource> source)
931 Check.Source (source);
933 return source.Provider.Execute<TSource> (
935 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
939 public static TResult Min<TSource, TResult> (this IQueryable<TSource> source, Expression<Func<TSource, TResult>> selector)
941 Check.SourceAndSelector (source, selector);
943 return source.Provider.Execute<TResult> (
945 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TResult)),
947 Expression.Quote (selector)));
955 public static IQueryable<TResult> OfType<TResult> (this IQueryable source)
957 Check.Source (source);
959 return (IQueryable<TResult>) source.Provider.CreateQuery (
961 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TResult)),
969 public static IOrderedQueryable<TSource> OrderBy<TSource, TKey> (this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector)
971 Check.SourceAndKeySelector (source, keySelector);
973 return (IOrderedQueryable<TSource>) source.Provider.CreateQuery<TSource> (
975 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey)),
977 Expression.Quote (keySelector)));
980 public static IOrderedQueryable<TSource> OrderBy<TSource, TKey> (this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector, IComparer<TKey> comparer)
982 Check.SourceAndKeySelector (source, keySelector);
984 return (IOrderedQueryable<TSource>) source.Provider.CreateQuery<TSource> (
986 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey)),
988 Expression.Quote (keySelector),
989 Expression.Constant (comparer, typeof (IComparer<TKey>))));
994 #region OrderByDescending
996 public static IOrderedQueryable<TSource> OrderByDescending<TSource, TKey> (this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector)
998 Check.SourceAndKeySelector (source, keySelector);
1000 return (IOrderedQueryable<TSource>) source.Provider.CreateQuery<TSource> (
1002 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey)),
1004 Expression.Quote (keySelector)));
1007 public static IOrderedQueryable<TSource> OrderByDescending<TSource, TKey> (this IQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector, IComparer<TKey> comparer)
1009 Check.SourceAndKeySelector (source, keySelector);
1011 return (IOrderedQueryable<TSource>) source.Provider.CreateQuery<TSource> (
1013 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey)),
1015 Expression.Quote (keySelector),
1016 Expression.Constant (comparer, typeof (IComparer<TKey>))));
1023 public static IQueryable<TSource> Reverse<TSource> (this IQueryable<TSource> source)
1025 Check.Source (source);
1027 return source.Provider.CreateQuery<TSource> (
1029 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1030 source.Expression));
1037 public static IQueryable<TResult> Select<TSource, TResult> (this IQueryable<TSource> source, Expression<Func<TSource, TResult>> selector)
1039 Check.SourceAndSelector (source, selector);
1041 return source.Provider.CreateQuery<TResult> (
1043 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TResult)),
1045 Expression.Quote (selector)));
1048 public static IQueryable<TResult> Select<TSource, TResult> (this IQueryable<TSource> source, Expression<Func<TSource, int, TResult>> selector)
1050 Check.SourceAndSelector (source, selector);
1052 return source.Provider.CreateQuery<TResult> (
1054 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TResult)),
1056 Expression.Quote (selector)));
1063 public static IQueryable<TResult> SelectMany<TSource, TResult> (this IQueryable<TSource> source, Expression<Func<TSource, IEnumerable<TResult>>> selector)
1065 Check.SourceAndSelector (source, selector);
1067 return source.Provider.CreateQuery<TResult> (
1069 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TResult)),
1071 Expression.Quote (selector)));
1074 public static IQueryable<TResult> SelectMany<TSource, TResult> (this IQueryable<TSource> source, Expression<Func<TSource, int, IEnumerable<TResult>>> selector)
1076 Check.SourceAndSelector (source, selector);
1078 return source.Provider.CreateQuery<TResult> (
1080 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TResult)),
1082 Expression.Quote (selector)));
1085 public static IQueryable<TResult> SelectMany<TSource, TCollection, TResult> (this IQueryable<TSource> source, Expression<Func<TSource, int, IEnumerable<TCollection>>> collectionSelector, Expression<Func<TSource, TCollection, TResult>> resultSelector)
1087 Check.SourceAndCollectionSelectorAndResultSelector (source, collectionSelector, resultSelector);
1089 return source.Provider.CreateQuery<TResult> (
1091 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TCollection), typeof (TResult)),
1093 Expression.Quote (collectionSelector),
1094 Expression.Quote (resultSelector)));
1097 public static IQueryable<TResult> SelectMany<TSource, TCollection, TResult> (this IQueryable<TSource> source, Expression<Func<TSource, IEnumerable<TCollection>>> collectionSelector, Expression<Func<TSource, TCollection, TResult>> resultSelector)
1099 Check.SourceAndCollectionSelectorAndResultSelector (source, collectionSelector, resultSelector);
1101 return source.Provider.CreateQuery<TResult> (
1103 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TCollection), typeof (TResult)),
1105 Expression.Quote (collectionSelector),
1106 Expression.Quote (resultSelector)));
1111 #region SequenceEqual
1113 public static bool SequenceEqual<TSource> (this IQueryable<TSource> source1, IEnumerable<TSource> source2)
1115 Check.Source1AndSource2 (source1, source2);
1117 return source1.Provider.Execute<bool> (
1119 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1121 Expression.Constant (source2, typeof (IEnumerable<TSource>))));
1124 public static bool SequenceEqual<TSource> (this IQueryable<TSource> source1, IEnumerable<TSource> source2, IEqualityComparer<TSource> comparer)
1126 Check.Source1AndSource2 (source1, source2);
1128 return source1.Provider.Execute<bool> (
1130 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1132 Expression.Constant (source2, typeof (IEnumerable<TSource>)),
1133 Expression.Constant (comparer, typeof (IEqualityComparer<TSource>))));
1140 public static TSource Single<TSource> (this IQueryable<TSource> source)
1142 Check.Source (source);
1144 return source.Provider.Execute<TSource> (
1146 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1147 source.Expression));
1150 public static TSource Single<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
1152 Check.SourceAndPredicate (source, predicate);
1154 return source.Provider.Execute<TSource> (
1156 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1158 Expression.Quote (predicate)));
1163 #region SingleOrDefault
1165 public static TSource SingleOrDefault<TSource> (this IQueryable<TSource> source)
1167 Check.Source (source);
1169 return source.Provider.Execute<TSource> (
1171 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1172 source.Expression));
1175 public static TSource SingleOrDefault<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
1177 Check.SourceAndPredicate (source, predicate);
1179 return source.Provider.Execute<TSource> (
1181 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1183 Expression.Quote (predicate)));
1190 public static IQueryable<TSource> Skip<TSource> (this IQueryable<TSource> source, int count)
1192 Check.Source (source);
1194 return source.Provider.CreateQuery<TSource> (
1196 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1198 Expression.Constant (count)));
1205 public static IQueryable<TSource> SkipWhile<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
1207 Check.SourceAndPredicate (source, predicate);
1209 return source.Provider.CreateQuery<TSource> (
1211 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1213 Expression.Quote (predicate)));
1216 public static IQueryable<TSource> SkipWhile<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, int, bool>> predicate)
1218 Check.SourceAndPredicate (source, predicate);
1220 return source.Provider.CreateQuery<TSource> (
1222 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1224 Expression.Quote (predicate)));
1233 public static int Sum<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, int>> selector)
1235 Check.SourceAndSelector (source, selector);
1237 return source.Provider.Execute<int> (
1239 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1241 Expression.Quote (selector)));
1244 public static int? Sum<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, int?>> selector)
1246 Check.SourceAndSelector (source, selector);
1248 return source.Provider.Execute<int?> (
1250 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1252 Expression.Quote (selector)));
1255 public static long Sum<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, long>> selector)
1257 Check.SourceAndSelector (source, selector);
1259 return source.Provider.Execute<long> (
1261 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1263 Expression.Quote (selector)));
1266 public static long? Sum<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, long?>> selector)
1268 Check.SourceAndSelector (source, selector);
1270 return source.Provider.Execute<long?> (
1272 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1274 Expression.Quote (selector)));
1277 public static float Sum<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, float>> selector)
1279 Check.SourceAndSelector (source, selector);
1281 return source.Provider.Execute<float> (
1283 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1285 Expression.Quote (selector)));
1288 public static float? Sum<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, float?>> selector)
1290 Check.SourceAndSelector (source, selector);
1292 return source.Provider.Execute<float?> (
1294 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1296 Expression.Quote (selector)));
1299 public static double Sum<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, double>> selector)
1301 Check.SourceAndSelector (source, selector);
1303 return source.Provider.Execute<double> (
1305 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1307 Expression.Quote (selector)));
1310 public static double? Sum<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, double?>> selector)
1312 Check.SourceAndSelector (source, selector);
1314 return source.Provider.Execute<double?> (
1316 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1318 Expression.Quote (selector)));
1321 public static decimal Sum<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, decimal>> selector)
1323 Check.SourceAndSelector (source, selector);
1325 return source.Provider.Execute<decimal> (
1327 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1329 Expression.Quote (selector)));
1332 public static decimal? Sum<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, decimal?>> selector)
1334 Check.SourceAndSelector (source, selector);
1336 return source.Provider.Execute<decimal?> (
1338 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1340 Expression.Quote (selector)));
1343 public static int Sum (this IQueryable<int> source)
1345 Check.Source (source);
1347 return source.Provider.Execute<int> (
1349 (MethodInfo) MethodBase.GetCurrentMethod (),
1350 source.Expression));
1353 public static int? Sum (this IQueryable<int?> source)
1355 Check.Source (source);
1357 return source.Provider.Execute<int?> (
1359 (MethodInfo) MethodBase.GetCurrentMethod (),
1360 source.Expression));
1365 public static long Sum (this IQueryable<long> source)
1367 Check.Source (source);
1369 return source.Provider.Execute<long> (
1371 (MethodInfo) MethodBase.GetCurrentMethod (),
1372 source.Expression));
1377 public static long? Sum (this IQueryable<long?> source)
1379 Check.Source (source);
1381 return source.Provider.Execute<long?> (
1383 (MethodInfo) MethodBase.GetCurrentMethod (),
1384 source.Expression));
1387 public static float Sum (this IQueryable<float> source)
1389 Check.Source (source);
1391 return source.Provider.Execute<float> (
1393 (MethodInfo) MethodBase.GetCurrentMethod (),
1394 source.Expression));
1397 public static float? Sum (this IQueryable<float?> source)
1399 Check.Source (source);
1401 return source.Provider.Execute<float?> (
1403 (MethodInfo) MethodBase.GetCurrentMethod (),
1404 source.Expression));
1408 public static double Sum (this IQueryable<double> source)
1410 Check.Source (source);
1412 return source.Provider.Execute<double> (
1414 (MethodInfo) MethodBase.GetCurrentMethod (),
1415 source.Expression));
1420 public static double? Sum (this IQueryable<double?> source)
1422 Check.Source (source);
1424 return source.Provider.Execute<double?> (
1426 (MethodInfo) MethodBase.GetCurrentMethod (),
1427 source.Expression));
1431 public static decimal Sum (this IQueryable<decimal> source)
1433 Check.Source (source);
1435 return source.Provider.Execute<decimal> (
1437 (MethodInfo) MethodBase.GetCurrentMethod (),
1438 source.Expression));
1443 public static decimal? Sum (this IQueryable<decimal?> source)
1445 Check.Source (source);
1447 return source.Provider.Execute<decimal?> (
1449 (MethodInfo) MethodBase.GetCurrentMethod (),
1450 source.Expression));
1459 public static IQueryable<TSource> Take<TSource> (this IQueryable<TSource> source, int count)
1461 Check.Source (source);
1463 return source.Provider.CreateQuery<TSource> (
1465 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1467 Expression.Constant (count)));
1474 public static IQueryable<TSource> TakeWhile<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
1476 Check.SourceAndPredicate (source, predicate);
1478 return source.Provider.CreateQuery<TSource> (
1480 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1482 Expression.Quote (predicate)));
1485 public static IQueryable<TSource> TakeWhile<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, int, bool>> predicate)
1487 Check.SourceAndPredicate (source, predicate);
1489 return source.Provider.CreateQuery<TSource> (
1491 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1493 Expression.Quote (predicate)));
1500 public static IOrderedQueryable<TSource> ThenBy<TSource, TKey> (this IOrderedQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector)
1502 Check.SourceAndKeySelector (source, keySelector);
1504 return (IOrderedQueryable<TSource>) source.Provider.CreateQuery (
1506 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey)),
1508 Expression.Quote (keySelector)));
1511 public static IOrderedQueryable<TSource> ThenBy<TSource, TKey> (this IOrderedQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector, IComparer<TKey> comparer)
1513 Check.SourceAndKeySelector (source, keySelector);
1515 return (IOrderedQueryable<TSource>) source.Provider.CreateQuery (
1517 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey)),
1519 Expression.Quote (keySelector),
1520 Expression.Constant (comparer, typeof (IComparer<TKey>))));
1525 #region ThenByDescending
1527 public static IOrderedQueryable<TSource> ThenByDescending<TSource, TKey> (this IOrderedQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector)
1529 Check.SourceAndKeySelector (source, keySelector);
1531 return (IOrderedQueryable<TSource>) source.Provider.CreateQuery (
1533 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey)),
1535 Expression.Quote (keySelector)));
1538 public static IOrderedQueryable<TSource> ThenByDescending<TSource, TKey> (this IOrderedQueryable<TSource> source, Expression<Func<TSource, TKey>> keySelector, IComparer<TKey> comparer)
1540 Check.SourceAndKeySelector (source, keySelector);
1542 return (IOrderedQueryable<TSource>) source.Provider.CreateQuery (
1544 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource), typeof (TKey)),
1546 Expression.Quote (keySelector),
1547 Expression.Constant (comparer, typeof (IComparer<TKey>))));
1554 public static IQueryable<TSource> Union<TSource> (this IQueryable<TSource> source1, IEnumerable<TSource> source2)
1556 Check.Source1AndSource2 (source1, source2);
1558 return source1.Provider.CreateQuery<TSource> (
1560 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1562 Expression.Constant (source2, typeof (IEnumerable<TSource>))));
1565 public static IQueryable<TSource> Union<TSource>(this IQueryable<TSource> source1, IEnumerable<TSource> source2, IEqualityComparer<TSource> comparer)
1567 Check.Source1AndSource2 (source1, source2);
1569 return source1.Provider.CreateQuery<TSource> (
1571 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1573 Expression.Constant (source2, typeof (IEnumerable<TSource>)),
1574 Expression.Constant (comparer, typeof (IEqualityComparer<TSource>))));
1582 public static IQueryable<TSource> Where<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, bool>> predicate)
1584 Check.SourceAndPredicate (source, predicate);
1586 return source.Provider.CreateQuery<TSource> (
1588 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1590 Expression.Quote (predicate)));
1593 public static IQueryable<TSource> Where<TSource> (this IQueryable<TSource> source, Expression<Func<TSource, int, bool>> predicate)
1595 Check.SourceAndPredicate (source, predicate);
1597 return source.Provider.CreateQuery<TSource> (
1599 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TSource)),
1601 Expression.Quote (predicate)));
1610 public static IQueryable<TResult> Zip<TFirst, TSecond, TResult> (this IQueryable<TFirst> source1, IEnumerable<TSecond> source2, Expression<Func<TFirst, TSecond, TResult>> resultSelector)
1612 Check.Source1AndSource2 (source1, source2);
1613 if (resultSelector == null)
1614 throw new ArgumentNullException ("resultSelector");
1616 return source1.Provider.CreateQuery<TResult> (
1618 MakeGeneric (MethodBase.GetCurrentMethod (), typeof (TFirst), typeof (TSecond), typeof (TResult)),
1620 Expression.Quote (resultSelector)));