Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs0767.cs

@@ -0,0 +1,20 @@
+// CS0767: Cannot implement interface `I<T,U>' with the specified type parameters because it causes method `I<int,int>.Foo(ref int)' to differ on parameter modifiers only
+// Line: 10
+
+interface I<T, U>
+{
+    void Foo(ref U t);
+    void Foo(out T u);
+}
+
+class A : I<int, int>
+{
+    void I<int, int>.Foo(ref int arg)
+	{
+	}
+	
+    public virtual void Foo(out int arg)
+	{
+		arg = 8;
+	}
+}