Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-variance-17.cs

@@ -0,0 +1,41 @@
+using System;
+
+interface InterfaceContravariat<in T>
+{
+	T Prop { set; }
+	T this[int arg] { set; }
+}
+
+interface InterfaceCovariant<out T>
+{
+	T Prop { get; }
+	T this[int arg] { get; }
+}
+
+class A : InterfaceContravariat<int>, InterfaceCovariant<long>
+{
+	public static int Main ()
+	{
+		return 0;
+	}
+
+	int InterfaceContravariat<int>.Prop
+	{
+		set { throw new NotImplementedException (); }
+	}
+
+	int InterfaceContravariat<int>.this[int arg]
+	{
+		set { throw new NotImplementedException (); }
+	}
+
+	long InterfaceCovariant<long>.Prop
+	{
+		get { throw new NotImplementedException (); }
+	}
+
+	long InterfaceCovariant<long>.this[int arg]
+	{
+		get { throw new NotImplementedException (); }
+	}
+}