Data commit

Task/Delegates/C-sharp/delegates.cs

@@ -0,0 +1,39 @@
+using System;
+
+interface IOperable
+{
+    string Operate();
+}
+
+class Inoperable
+{
+}
+
+class Operable : IOperable
+{
+    public string Operate()
+    {
+        return "Delegate implementation.";
+    }
+}
+
+class Delegator : IOperable
+{
+    object Delegate;
+
+    public string Operate()
+    {
+        var operable = Delegate as IOperable;
+        return operable != null ? operable.Operate() : "Default implementation.";
+    }
+
+    static void Main()
+    {
+        var delegator = new Delegator();
+        foreach (var @delegate in new object[] { null, new Inoperable(), new Operable() })
+        {
+            delegator.Delegate = @delegate;
+            Console.WriteLine(delegator.Operate());
+        }
+    }
+}