sample code

MySolution/ConsoleApp/Samples/EventSample.cs

@@ -0,0 +1,33 @@
+using System;
+
+namespace Samples
+{
+    public delegate void CustomEventHandler(object sender, EventArgs e);
+
+    class EventSample
+    {
+        public static void Sample()
+        {
+            Button button = new Button();
+            button.Click += new CustomEventHandler(Button_Click);
+
+            button.OnClick();
+        }
+
+        private static void Button_Click(object sender, EventArgs e)
+        {
+            System.Console.WriteLine("Button clicked!");
+        }
+    }
+    
+    class Button
+    {
+        public event CustomEventHandler Click;
+
+        public void OnClick()
+        {
+            if (Click != null)
+                Click(this, EventArgs.Empty);
+        }
+    }
+}