Fixed anther system.core 3.5 vs. 4.0 type lookup case.

ICSharpCode.NRefactory/TypeSystem/Implementation/GetClassTypeReference.cs

@@ -100,7 +100,8 @@ namespace ICSharpCode.NRefactory.TypeSystem.Implementation
 				IAssembly asm = assembly.Resolve(context);
 				if (asm != null) {
 					type = asm.GetTypeDefinition(nameSpace, name, typeParameterCount);
-				} else {
+				}
+				if (type == null) {
 					type = ResolveInContext(context);
 				}
 			}