Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-720.cs

@@ -0,0 +1,30 @@
+// Compiler options: -warn:4 -warnaserror
+
+using System;
+
+namespace N
+{
+	class Program
+	{
+		public static void Main ()
+		{
+			Parent pr = new Child();
+			((Child)pr).OnExample();
+		}
+	}
+
+	public abstract class Parent
+	{
+		public delegate void ExampleHandler();
+		public abstract event ExampleHandler Example;
+	}
+
+	public class Child : Parent
+	{
+		public override event ExampleHandler Example;
+		public void OnExample()
+		{
+			if (Example != null) Example();
+		}
+	}
+}