Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs0019-55.cs

@@ -0,0 +1,28 @@
+// CS0019: Operator `==' cannot be applied to operands of type `A' and `int?'
+// Line: 22
+
+class A
+{
+	public static bool operator == (A a, int b)
+	{
+		return false;
+	}
+	
+	public static bool operator != (A a, int b)
+	{
+		return false;
+	}
+}
+
+class C
+{
+	public static void Main ()
+	{
+		A a = new A ();
+		object b = a == Id;
+	}
+	
+	static int? Id {
+		get { return 1; }
+	}
+}