mcs/class/corlib/System.Reflection.Emit/CustomAttributeBuilder.cs

   1
   2 //
   3 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining
   6 // a copy of this software and associated documentation files (the
   7 // "Software"), to deal in the Software without restriction, including
   8 // without limitation the rights to use, copy, modify, merge, publish,
   9 // distribute, sublicense, and/or sell copies of the Software, and to
  10 // permit persons to whom the Software is furnished to do so, subject to
  11 // the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be
  14 // included in all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23 //
  24
  25 //
  26 // System.Reflection.Emit/CustomAttributeBuilder.cs
  27 //
  28 // Author:
  29 //   Paolo Molaro (lupus@ximian.com)
  30 //
  31 // (C) 2001 Ximian, Inc.  http://www.ximian.com
  32 //
  33
  34 using System;
  35 using System.Reflection;
  36 using System.Reflection.Emit;
  37 using System.Runtime.CompilerServices;
  38 using System.Runtime.InteropServices;
  39
  40 namespace System.Reflection.Emit {
  41         [ComVisible (true)]
  42         [ComDefaultInterface (typeof (_CustomAttributeBuilder))]
  43         [ClassInterface (ClassInterfaceType.None)]
  44         [StructLayout (LayoutKind.Sequential)]
  45         public class CustomAttributeBuilder : _CustomAttributeBuilder {
  46                 ConstructorInfo ctor;
  47                 byte[] data;
  48
  49                 internal ConstructorInfo Ctor {
  50                         get {return ctor;}
  51                 }
  52
  53                 internal byte[] Data {
  54                         get {return data;}
  55                 }
  56
  57                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  58                 static extern byte[] GetBlob(Assembly asmb, ConstructorInfo con, object[] constructorArgs, PropertyInfo[] namedProperties, object[] propertyValues, FieldInfo[] namedFields, object[] fieldValues);
  59
  60                 internal CustomAttributeBuilder( ConstructorInfo con, byte[] cdata) {
  61                         ctor = con;
  62                         data = (byte[])cdata.Clone ();
  63                         /* should we check that the user supplied data is correct? */
  64                 }
  65
  66                 public CustomAttributeBuilder( ConstructorInfo con, object[] constructorArgs)
  67                 {
  68                         Initialize (con, constructorArgs, new PropertyInfo [0], new object [0],
  69                                         new FieldInfo [0], new object [0]);
  70                 }
  71                 public CustomAttributeBuilder( ConstructorInfo con, object[] constructorArgs,
  72                                 FieldInfo[] namedFields, object[] fieldValues)
  73                 {
  74                         Initialize (con, constructorArgs, new PropertyInfo [0], new object [0],
  75                                         namedFields, fieldValues);
  76                 }
  77                 public CustomAttributeBuilder( ConstructorInfo con, object[] constructorArgs,
  78                                 PropertyInfo[] namedProperties, object[] propertyValues)
  79                 {
  80                         Initialize (con, constructorArgs, namedProperties, propertyValues, new FieldInfo [0],
  81                                         new object [0]);
  82                 }
  83                 public CustomAttributeBuilder( ConstructorInfo con, object[] constructorArgs,
  84                                 PropertyInfo[] namedProperties, object[] propertyValues,
  85                                 FieldInfo[] namedFields, object[] fieldValues)
  86                 {
  87                         Initialize (con, constructorArgs, namedProperties, propertyValues, namedFields, fieldValues);
  88                 }
  89
  90                 private bool IsValidType (Type t)
  91                 {
  92                         /* FIXME: Add more checks */
  93                         if (t.IsArray && t.GetArrayRank () > 1)
  94                                 return false;
  95                         if (t is TypeBuilder && t.IsEnum) {
  96                                 // Check that the enum is properly constructed, the unmanaged code
  97                                 // depends on this
  98                                 Enum.GetUnderlyingType (t);
  99                         }
 100                         if (t.IsClass && !(t.IsArray || t == typeof (object) || t == typeof (Type) || t == typeof (string) || t.Assembly.GetName ().Name == "mscorlib"))
 101                                 return false;
 102                         if (t.IsValueType && !(t.IsPrimitive || t.IsEnum || ((t.Assembly is AssemblyBuilder) && t.Assembly.GetName ().Name == "mscorlib")))
 103                                 return false;
 104                         return true;
 105                 }
 106
 107                 private bool IsValidParam (object o, Type paramType)
 108                 {
 109                         Type t = o.GetType ();
 110                         if (!IsValidType (t))
 111                                 return false;
 112                         if (paramType == typeof (object)) {
 113                                 if (t.IsArray && t.GetArrayRank () == 1)
 114                                         return IsValidType (t.GetElementType ());
 115                                 if (!t.IsPrimitive && !typeof (Type).IsAssignableFrom (t) && t != typeof (string) && !t.IsEnum)
 116                                         return false;
 117                         }
 118                         return true;
 119                 }
 120
 121                 static bool IsValidValue (Type type, object value) {
 122                         if (type.IsValueType && value == null)
 123                                 return false;
 124                         if (type.IsArray && type.GetElementType ().IsValueType) {
 125                                 foreach (var v in (Array)value) {
 126                                         if (v == null)
 127                                                 return false;
 128                                 }
 129                         }
 130                         return true;
 131                 }
 132
 133                 private void Initialize (ConstructorInfo con, object [] constructorArgs,
 134                                 PropertyInfo [] namedProperties, object [] propertyValues,
 135                                 FieldInfo [] namedFields, object [] fieldValues)
 136                 {
 137                         ctor = con;
 138                         if (con == null)
 139                                 throw new ArgumentNullException ("con");
 140                         if (constructorArgs == null)
 141                                 throw new ArgumentNullException ("constructorArgs");
 142                         if (namedProperties == null)
 143                                 throw new ArgumentNullException ("namedProperties");
 144                         if (propertyValues == null)
 145                                 throw new ArgumentNullException ("propertyValues");
 146                         if (namedFields == null)
 147                                 throw new ArgumentNullException ("namedFields");
 148                         if (fieldValues == null)
 149                                 throw new ArgumentNullException ("fieldValues");
 150                         if (con.GetParameterCount () != constructorArgs.Length)
 151                                 throw new ArgumentException ("Parameter count does not match " +
 152                                                 "passed in argument value count.");
 153                         if (namedProperties.Length != propertyValues.Length)
 154                                 throw new ArgumentException ("Array lengths must be the same.",
 155                                                 "namedProperties, propertyValues");
 156                         if (namedFields.Length != fieldValues.Length)
 157                                 throw new ArgumentException ("Array lengths must be the same.",
 158                                                 "namedFields, fieldValues");
 159                         if ((con.Attributes & MethodAttributes.Static) == MethodAttributes.Static ||
 160                                         (con.Attributes & MethodAttributes.MemberAccessMask) == MethodAttributes.Private)
 161                                 throw new ArgumentException ("Cannot have private or static constructor.");
 162
 163                         Type atype = ctor.DeclaringType;
 164                         int i;
 165                         i = 0;
 166                         foreach (FieldInfo fi in namedFields) {
 167                                 Type t = fi.DeclaringType;
 168                                 if ((atype != t) && (!t.IsSubclassOf (atype)) && (!atype.IsSubclassOf (t)))
 169                                         throw new ArgumentException ("Field '" + fi.Name + "' does not belong to the same class as the constructor");
 170                                 if (!IsValidType (fi.FieldType))
 171                                         throw new ArgumentException ("Field '" + fi.Name + "' does not have a valid type.");
 172                                 if (!IsValidValue (fi.FieldType, fieldValues [i]))
 173                                         throw new ArgumentException ("Field " + fi.Name + " is not a valid value.");
 174                                 // FIXME: Check enums and TypeBuilders as well
 175                                 if (fieldValues [i] != null)
 176                                         // IsEnum does not seem to work on TypeBuilders
 177                                         if (!(fi.FieldType is TypeBuilder) && !fi.FieldType.IsEnum && !fi.FieldType.IsInstanceOfType (fieldValues [i])) {
 178                                                 //
 179                                                 // mcs allways uses object[] for array types and
 180                                                 // MS.NET allows this
 181                                                 //
 182                                                 if (!fi.FieldType.IsArray)
 183                                                         throw new ArgumentException ("Value of field '" + fi.Name + "' does not match field type: " + fi.FieldType);
 184                                                 }
 185                                 i ++;
 186                         }
 187
 188                         i = 0;
 189                         foreach (PropertyInfo pi in namedProperties) {
 190                                 if (!pi.CanWrite)
 191                                         throw new ArgumentException ("Property '" + pi.Name + "' does not have a setter.");
 192                                 Type t = pi.DeclaringType;
 193                                 if ((atype != t) && (!t.IsSubclassOf (atype)) && (!atype.IsSubclassOf (t)))
 194                                         throw new ArgumentException ("Property '" + pi.Name + "' does not belong to the same class as the constructor");
 195                                 if (!IsValidType (pi.PropertyType))
 196                                         throw new ArgumentException ("Property '" + pi.Name + "' does not have a valid type.");
 197                                 if (!IsValidValue (pi.PropertyType, propertyValues [i]))
 198                                         throw new ArgumentException ("Property " + pi.Name + " is not a valid value.");
 199                                 if (propertyValues [i] != null) {
 200                                         if (!(pi.PropertyType is TypeBuilder) && !pi.PropertyType.IsEnum && !pi.PropertyType.IsInstanceOfType (propertyValues [i]))
 201                                                 if (!pi.PropertyType.IsArray)
 202                                                         throw new ArgumentException ("Value of property '" + pi.Name + "' does not match property type: " + pi.PropertyType + " -> " + propertyValues [i]);
 203                                 }
 204                                 i ++;
 205                         }
 206
 207                         i = 0;
 208                         foreach (ParameterInfo pi in GetParameters (con)) {
 209                                 if (pi != null) {
 210                                         Type paramType = pi.ParameterType;
 211                                         if (!IsValidType (paramType))
 212                                                 throw new ArgumentException ("Parameter " + i + " does not have a valid type.");
 213                                         if (!IsValidValue (paramType, constructorArgs [i]))
 214                                                 throw new ArgumentException ("Parameter " + i + " is not a valid value.");
 215
 216                                         if (constructorArgs [i] != null) {
 217                                                 if (!(paramType is TypeBuilder) && !paramType.IsEnum && !paramType.IsInstanceOfType (constructorArgs [i]))
 218                                                         if (!paramType.IsArray)
 219                                                                 throw new ArgumentException ("Value of argument " + i + " does not match parameter type: " + paramType + " -> " + constructorArgs [i]);
 220                                                 if (!IsValidParam (constructorArgs [i], paramType))
 221                                                         throw new ArgumentException ("Cannot emit a CustomAttribute with argument of type " + constructorArgs [i].GetType () + ".");
 222                                         }
 223                                 }
 224                                 i ++;
 225                         }
 226
 227                         data = GetBlob (atype.Assembly, con, constructorArgs, namedProperties, propertyValues, namedFields, fieldValues);
 228                 }
 229
 230                 /* helper methods */
 231                 internal static int decode_len (byte[] data, int pos, out int rpos) {
 232                         int len = 0;
 233                         if ((data [pos] & 0x80) == 0) {
 234                                 len = (int)(data [pos++] & 0x7f);
 235                         } else if ((data [pos] & 0x40) == 0) {
 236                                 len = ((data [pos] & 0x3f) << 8) + data [pos + 1];
 237                                 pos += 2;
 238                         } else {
 239                                 len = ((data [pos] & 0x1f) << 24) + (data [pos + 1] << 16) + (data [pos + 2] << 8) + data [pos + 3];
 240                                 pos += 4;
 241                         }
 242                         rpos = pos;
 243                         return len;
 244                 }
 245
 246                 internal static string string_from_bytes (byte[] data, int pos, int len)
 247                 {
 248                         return System.Text.Encoding.UTF8.GetString(data, pos, len);
 249                 }
 250
 251                 internal string string_arg ()
 252                 {
 253                         int pos = 2;
 254                         int len = decode_len (data, pos, out pos);
 255                         return string_from_bytes (data, pos, len);
 256                 }
 257
 258                 internal static UnmanagedMarshal get_umarshal (CustomAttributeBuilder customBuilder, bool is_field) {
 259                         byte[] data = customBuilder.Data;
 260                         UnmanagedType subtype = (UnmanagedType)0x50; /* NATIVE_MAX */
 261                         int sizeConst = -1;
 262                         int sizeParamIndex = -1;
 263                         bool hasSize = false;
 264                         int value;
 265                         int utype; /* the (stupid) ctor takes a short or an enum ... */
 266                         string marshalTypeName = null;
 267                         Type marshalTypeRef = null;
 268                         string marshalCookie = String.Empty;
 269                         utype = (int)data [2];
 270                         utype |= ((int)data [3]) << 8;
 271
 272                         string first_type_name = GetParameters (customBuilder.Ctor) [0].ParameterType.FullName;
 273                         int pos = 6;
 274                         if (first_type_name == "System.Int16")
 275                                 pos = 4;
 276                         int nnamed = (int)data [pos++];
 277                         nnamed |= ((int)data [pos++]) << 8;
 278
 279                         for (int i = 0; i < nnamed; ++i) {
 280                                 int paramType; // What is this ?
 281
 282                                 /* Skip field/property signature */
 283                                 pos ++;
 284                                 /* Read type */
 285                                 paramType = ((int)data [pos++]);
 286                                 if (paramType == 0x55) {
 287                                         /* enums, the value is preceeded by the type */
 288                                         int len2 = decode_len (data, pos, out pos);
 289                                         string_from_bytes (data, pos, len2);
 290                                         pos += len2;
 291                                 }
 292                                 int len = decode_len (data, pos, out pos);
 293                                 string named_name = string_from_bytes (data, pos, len);
 294                                 pos += len;
 295
 296                                 switch (named_name) {
 297                                 case "ArraySubType":
 298                                         value = (int)data [pos++];
 299                                         value |= ((int)data [pos++]) << 8;
 300                                         value |= ((int)data [pos++]) << 16;
 301                                         value |= ((int)data [pos++]) << 24;
 302                                         subtype = (UnmanagedType)value;
 303                                         break;
 304                                 case "SizeConst":
 305                                         value = (int)data [pos++];
 306                                         value |= ((int)data [pos++]) << 8;
 307                                         value |= ((int)data [pos++]) << 16;
 308                                         value |= ((int)data [pos++]) << 24;
 309                                         sizeConst = value;
 310                                         hasSize = true;
 311                                         break;
 312                                 case "SafeArraySubType":
 313                                         value = (int)data[pos++];
 314                                         value |= ((int)data[pos++]) << 8;
 315                                         value |= ((int)data[pos++]) << 16;
 316                                         value |= ((int)data[pos++]) << 24;
 317                                         subtype = (UnmanagedType)value;
 318                                         break;
 319                                 case "IidParameterIndex":
 320                                         pos += 4;
 321                                         break;
 322                                 case "SafeArrayUserDefinedSubType":
 323                                         len = decode_len (data, pos, out pos);
 324                                         string_from_bytes (data, pos, len);
 325                                         pos += len;
 326                                         break;
 327                                 case "SizeParamIndex":
 328                                         value = (int)data [pos++];
 329                                         value |= ((int)data [pos++]) << 8;
 330                                         sizeParamIndex = value;
 331                                         hasSize = true;
 332                                         break;
 333                                 case "MarshalType":
 334                                         len = decode_len (data, pos, out pos);
 335                                         marshalTypeName = string_from_bytes (data, pos, len);
 336                                         pos += len;
 337                                         break;
 338                                 case "MarshalTypeRef":
 339                                         len = decode_len (data, pos, out pos);
 340                                         marshalTypeName = string_from_bytes (data, pos, len);
 341                                         marshalTypeRef = Type.GetType (marshalTypeName);
 342                                         pos += len;
 343                                         break;
 344                                 case "MarshalCookie":
 345                                         len = decode_len (data, pos, out pos);
 346                                         marshalCookie = string_from_bytes (data, pos, len);
 347                                         pos += len;
 348                                         break;
 349                                 default:
 350                                         throw new Exception ("Unknown MarshalAsAttribute field: " + named_name);
 351                                 }
 352                         }
 353
 354                         switch ((UnmanagedType)utype) {
 355                         case UnmanagedType.LPArray:
 356                                 if (hasSize)
 357                                         return UnmanagedMarshal.DefineLPArrayInternal (subtype, sizeConst, sizeParamIndex);
 358                                 else
 359                                         return UnmanagedMarshal.DefineLPArray (subtype);
 360                         case UnmanagedType.SafeArray:
 361                                 return UnmanagedMarshal.DefineSafeArray (subtype);
 362                         case UnmanagedType.ByValArray:
 363                                 if (!is_field)
 364                                         throw new ArgumentException ("Specified unmanaged type is only valid on fields");
 365
 366                                 return UnmanagedMarshal.DefineByValArray (sizeConst);
 367                         case UnmanagedType.ByValTStr:
 368                                 return UnmanagedMarshal.DefineByValTStr (sizeConst);
 369                         case UnmanagedType.CustomMarshaler:
 370                                 return UnmanagedMarshal.DefineCustom (marshalTypeRef, marshalCookie, marshalTypeName, Guid.Empty);
 371                         default:
 372                                 return UnmanagedMarshal.DefineUnmanagedMarshal ((UnmanagedType)utype);
 373                         }
 374                 }
 375
 376                 static Type elementTypeToType (int elementType) {
 377                         /* Partition II, section 23.1.16 */
 378                         switch (elementType) {
 379                         case 0x02:
 380                                 return typeof (bool);
 381                         case 0x03:
 382                                 return typeof (char);
 383                         case 0x04:
 384                                 return typeof (sbyte);
 385                         case 0x05:
 386                                 return typeof (byte);
 387                         case 0x06:
 388                                 return typeof (short);
 389                         case 0x07:
 390                                 return typeof (ushort);
 391                         case 0x08:
 392                                 return typeof (int);
 393                         case 0x09:
 394                                 return typeof (uint);
 395                         case 0x0a:
 396                                 return typeof (long);
 397                         case 0x0b:
 398                                 return typeof (ulong);
 399                         case 0x0c:
 400                                 return typeof (float);
 401                         case 0x0d:
 402                                 return typeof (double);
 403                         case 0x0e:
 404                                 return typeof (string);
 405                         default:
 406                                 throw new Exception ("Unknown element type '" + elementType + "'");
 407                         }
 408                 }
 409
 410                 static object decode_cattr_value (Type t, byte[] data, int pos, out int rpos) {
 411                         switch (Type.GetTypeCode (t)) {
 412                         case TypeCode.String:
 413                                 if (data [pos] == 0xff) {
 414                                         rpos = pos + 1;
 415                                         return null;
 416                                 }
 417                                 int len = decode_len (data, pos, out pos);
 418                                 rpos = pos + len;
 419                                 return string_from_bytes (data, pos, len);
 420                         case TypeCode.Int32:
 421                                 rpos = pos + 4;
 422                                 return data [pos] + (data [pos + 1] << 8) + (data [pos + 2] << 16) + (data [pos + 3] << 24);
 423                         case TypeCode.Boolean:
 424                                 rpos = pos + 1;
 425                                 return (data [pos] == 0) ? false : true;
 426                         case TypeCode.Object:
 427                                 int subtype = data [pos];
 428                                 pos += 1;
 429
 430                                 if (subtype >= 0x02 && subtype <= 0x0e)
 431                                         return decode_cattr_value (elementTypeToType (subtype), data, pos, out rpos);
 432                                 else
 433                                         throw new Exception ("Subtype '" + subtype + "' of type object not yet handled in decode_cattr_value");
 434                         default:
 435                                 throw new Exception ("FIXME: Type " + t + " not yet handled in decode_cattr_value.");
 436                         }
 437                 }
 438
 439                 internal struct CustomAttributeInfo {
 440                         public ConstructorInfo ctor;
 441                         public object[] ctorArgs;
 442                         public string[] namedParamNames;
 443                         public object[] namedParamValues;
 444                 }
 445
 446                 internal static CustomAttributeInfo decode_cattr (CustomAttributeBuilder customBuilder) {
 447                         byte[] data = customBuilder.Data;
 448                         ConstructorInfo ctor = customBuilder.Ctor;
 449                         int pos = 0;
 450
 451                         CustomAttributeInfo info = new CustomAttributeInfo ();
 452
 453                         // Prolog
 454                         if (data.Length < 2)
 455                                 throw new Exception ("Custom attr length is only '" + data.Length + "'");
 456                         if ((data [0] != 0x1) || (data [1] != 0x00))
 457                                 throw new Exception ("Prolog invalid");
 458                         pos = 2;
 459
 460                         ParameterInfo [] pi = GetParameters (ctor);
 461                         info.ctor = ctor;
 462                         info.ctorArgs = new object [pi.Length];
 463                         for (int i = 0; i < pi.Length; ++i)
 464                                 info.ctorArgs [i] = decode_cattr_value (pi [i].ParameterType, data, pos, out pos);
 465
 466                         int num_named = data [pos] + (data [pos + 1] * 256);
 467                         pos += 2;
 468
 469                         info.namedParamNames = new string [num_named];
 470                         info.namedParamValues = new object [num_named];
 471                         for (int i = 0; i < num_named; ++i) {
 472                                 int named_type = data [pos++];
 473                                 int data_type = data [pos++];
 474                                 string enum_type_name = null;
 475
 476                                 if (data_type == 0x55) {
 477                                         int len2 = decode_len (data, pos, out pos);
 478                                         enum_type_name = string_from_bytes (data, pos, len2);
 479                                         pos += len2;
 480                                 }
 481
 482                                 int len = decode_len (data, pos, out pos);
 483                                 string name = string_from_bytes (data, pos, len);
 484                                 info.namedParamNames [i] = name;
 485                                 pos += len;
 486
 487                                 if (named_type == 0x53) {
 488                                         /* Field */
 489                                         FieldInfo fi = ctor.DeclaringType.GetField (name, BindingFlags.Public|BindingFlags.NonPublic|BindingFlags.Instance);
 490                                         if (fi == null)
 491                                                 throw new Exception ("Custom attribute type '" + ctor.DeclaringType + "' doesn't contain a field named '" + name + "'");
 492
 493                                         object val = decode_cattr_value (fi.FieldType, data, pos, out pos);
 494                                         if (enum_type_name != null) {
 495                                                 Type enumType = Type.GetType (enum_type_name);
 496                                                 val = Enum.ToObject (enumType, val);
 497                                         }
 498
 499                                         info.namedParamValues [i] = val;
 500                                 }
 501                                 else
 502                                         // FIXME:
 503                                         throw new Exception ("Unknown named type: " + named_type);
 504                         }
 505
 506                         return info;
 507                 }
 508
 509                 void _CustomAttributeBuilder.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
 510                 {
 511                         throw new NotImplementedException ();
 512                 }
 513
 514                 void _CustomAttributeBuilder.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
 515                 {
 516                         throw new NotImplementedException ();
 517                 }
 518
 519                 void _CustomAttributeBuilder.GetTypeInfoCount (out uint pcTInfo)
 520                 {
 521                         throw new NotImplementedException ();
 522                 }
 523
 524                 void _CustomAttributeBuilder.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
 525                 {
 526                         throw new NotImplementedException ();
 527                 }
 528
 529                 static ParameterInfo [] GetParameters (ConstructorInfo ctor)
 530                 {
 531                         ConstructorBuilder cb = ctor as ConstructorBuilder;
 532                         if (cb != null)
 533                                 return cb.GetParametersInternal ();
 534                         return ctor.GetParameters ();
 535                 }
 536         }
 537 }