Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

mcs/errors/cs0108-20.cs

@@ -0,0 +1,15 @@
+// CS0108: `B.Adapter' hides inherited member `A.Adapter'. Use the new keyword if hiding was intended
+// Line: 14
+// Compiler options: -warnaserror -warn:2
+
+class A
+{
+	public abstract class Adapter
+	{
+	}
+}
+
+class B : A
+{
+	public int Adapter { get; set; }
+}