mcs/class/System.ComponentModel.Composition/src/ComponentModel/Microsoft/Internal/LazyServices.cs

   1 using System;\r
   2 using System.Collections.Generic;\r
   3 using System.Linq;\r
   4 using System.Threading;\r
   5 using System.Text;\r
   6 using System.Globalization;\r
   7 \r
   8 namespace Microsoft.Internal\r
   9 {\r
  10     internal static class LazyServices\r
  11     {\r
  12         public static Lazy<T> AsLazy<T>(this T t)\r
  13             where T : class\r
  14         {\r
  15             return new Lazy<T>(() => t, false);\r
  16         }\r
  17 \r
  18         public static T GetNotNullValue<T>(this Lazy<T> lazy, string argument)\r
  19             where T : class\r
  20         {\r
  21             Assumes.NotNull(lazy);\r
  22             T value = lazy.Value;\r
  23             if (value == null)\r
  24             {\r
  25                 throw new InvalidOperationException(\r
  26                     string.Format(CultureInfo.CurrentCulture, Strings.LazyServices_LazyResolvesToNull, typeof(T), argument));\r
  27             }\r
  28 \r
  29             return value;\r
  30         }\r
  31     }\r
  32 }\r