corefx/SR.cs
+../../../external/corefx/src/Common/src/System/Collections/Generic/ReferenceEqualityComparer.cs
+
../../../external/corefx/src/System.Collections/src/System/Collections/Generic/CollectionExtensions.cs
../../../external/corefx/src/System.Collections.Concurrent/src/System/Collections/Concurrent/CDSCollectionETWBCLProvider.cs