Imported Upstream version 4.2.0.179

Former-commit-id: 4610231f55806d2a05ed69e5ff3faa7336cc1479

mcs/tests/test-921-lib.cs

@@ -0,0 +1,18 @@
+// Compiler options: -t:library
+
+namespace Reference
+{
+	public interface IB
+	{
+	}
+
+	public interface IA : IHide
+	{
+		new IB Equals { get; }
+	}
+	
+	public interface IHide
+	{
+		bool Equals(object o);
+	}
+}