Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs0311-3.cs

@@ -0,0 +1,39 @@
+// CS0311: The type `B' cannot be used as type parameter `T' in the generic type or method `Foo<T>'. There is no implicit reference conversion from `B' to `A'
+// Line: 35
+using System;
+
+public class Foo<T>
+	where T : A
+{
+	public void Test (T t)
+	{
+		Console.WriteLine (t);
+		Console.WriteLine (t.GetType ());
+		t.Hello ();
+	}
+}
+
+public class A
+{
+	public void Hello ()
+	{
+		Console.WriteLine ("Hello World");
+	}
+}
+
+public class B
+{
+	public static implicit operator A (B b)
+	{
+		return new A ();
+	}
+}
+
+class X
+{
+	Foo<B> b;
+
+	static void Main ()
+	{
+	}
+}