../../../external/corert/src/System.Private.CoreLib/shared/System/Diagnostics/Debug.cs
../../../external/corert/src/System.Private.CoreLib/shared/System/Runtime/CompilerServices/IsReadOnlyAttribute.cs
+../../../external/corert/src/System.Private.CoreLib/shared/System/Runtime/CompilerServices/IsByRefLikeAttribute.cs
../../../external/corert/src/System.Private.CoreLib/shared/System/Runtime/CompilerServices/ITuple.cs
../../../external/corert/src/System.Private.CoreLib/shared/System/Runtime/CompilerServices/RuntimeFeature.cs
../../../external/corert/src/System.Private.CoreLib/shared/System/Runtime/CompilerServices/TupleElementNamesAttribute.cs
corefx/SR.cs
+../../../external/corefx/src/System.Collections/src/System/Collections/Generic/CollectionExtensions.cs
+
../../../external/corefx/src/System.Collections.Concurrent/src/System/Collections/Concurrent/CDSCollectionETWBCLProvider.cs
../../../external/corefx/src/System.Collections.Concurrent/src/System/Collections/Concurrent/ConcurrentDictionary.cs
../../../external/corefx/src/System.Collections.Concurrent/src/System/Collections/Concurrent/ConcurrentQueue.cs
-// CS1061: Type `int' does not contain a definition for `GetValueOrDefault' and no extension method `GetValueOrDefault' of type `int' could be found. Are you missing an assembly reference?
+// CS1061: Type `int' does not contain a definition for `GetValueOrDefault' and no extension method `GetValueOrDefault' of type `int' could be found. Are you missing `System.Collections.Generic' using directive?
// Line: 9
class C