Demonstrates adding multiple methods to a delegate

   


/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa

Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/
 
// MultiDlg.cs -- Demonstrates adding multiple methods to a delegate.
//
//                Compile this program with the following command line
//                    C:>csc MultiDlg.cs
using System;

namespace nsDelegates
{
    public class MultiDlg
    {
        public delegate void MultiMethod ();

        static public void Main ()
        {
            MultiMethod dlg;
// Assign the first method to the delegate.
            dlg = new MultiMethod (FirstDelegate);
// Call it to show the first method is being called
            dlg ();
// Add a second method to the delegate.
            dlg += new MultiMethod (SecondDelegate);
// Call it to show both methods execute.
            Console.WriteLine ();
            dlg ();
// Remove the first method from the delegate.
            dlg -= new MultiMethod (FirstDelegate);
// Call it to show that only the second method executes
            Console.WriteLine ();
            dlg ();
        }
        static public void FirstDelegate()
        {
            Console.WriteLine ("First delegate called");
        }
        static public void SecondDelegate()
        {
            Console.WriteLine ("Second delegate called");
        }
    }
}