Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs1540-9.cs

@@ -0,0 +1,37 @@
+// CS1540: Cannot access protected member `A.Test(int)' via a qualifier of type `B'. The qualifier must be of type `C' or derived from it
+// Line: 28
+using System;
+
+public abstract class A
+{
+	protected virtual void Test (int a)
+	{ }
+
+	public void Test ()
+	{ }
+}
+
+public class B : A
+{
+	protected override void Test (int a)
+	{
+		base.Test (a);
+	}
+}
+
+public class C : A
+{
+	private B B;
+
+	protected override void Test (int a)
+	{
+		B.Test (a);
+		base.Test (a);
+	}
+}
+
+class X
+{
+	static void Main ()
+	{ }
+}