Descriptor for a class defined in System (mscorlib)
Inheritance: ClassRef
		internal Class GetSpecialSystemClass(PrimitiveType pType) 
		{
			int ix = pType.GetSystemTypeIx();
			if (systemClasses[ix] == null && !PEFile.IsMSCorlib) {
				systemClasses[ix] = new SystemClass(pType,this,metaData);
				metaData.AddToTable(MDTable.TypeRef,systemClasses[ix]);
			}
			return systemClasses[ix];
		}
		private Class GetSpecialClass(string nsName,string name) 
		{
			if (nsName.CompareTo(systemName) != 0) return null;
			int hash = name.GetHashCode();
			for (int i=0; i < specialNames.Length; i++) {
				if (hash != specialNames[i])
					continue;
				if (systemClasses[i] == null) {
					if (i < valueTypeIx) {
						systemClasses[i] = new SystemClass(systemTypes[i],this,metaData);
						if ((systemTypes[i] != PrimitiveType.Object) &&
								(systemTypes[i] != PrimitiveType.String)) {
							systemClasses[i].MakeValueClass(ValueClass.ValueType);
						}
					} else {
						systemClasses[i] = new ClassRef(nsName,name,metaData);
						((ClassRef) systemClasses[i]).SetParent(this);
						if (!ClassDef.IsValueType (nsName, name) && !ClassDef.IsEnum (nsName, name))
							systemClasses[i].MakeValueClass(ValueClass.ValueType);
					}
					metaData.AddToTable(MDTable.TypeRef,systemClasses[i]);
				}
				return systemClasses[i];
			}
			return null;
		}