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// This generic delegate can call any method



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[book] [en] Pro C# 2008 and the NET 3.5 Platform Fourth Edition

// This generic delegate can call any method

// returning void and taking a single parameter.

public delegate void MyGenericDelegate(T arg);

class Program

{

static void Main(string[] args)



{

Console.WriteLine("***** Generic Delegates *****\n");



// Register targets.

MyGenericDelegate strTarget =

new MyGenericDelegate(StringTarget);

strTarget("Some string data");

MyGenericDelegate intTarget =

new MyGenericDelegate(IntTarget);

intTarget(9);

Console.ReadLine();

}

static void StringTarget(string arg)



{

Console.WriteLine("arg in uppercase is: {0}", arg.ToUpper());

}

static void IntTarget(int arg)



{

Console.WriteLine("++arg is: {0}", ++arg);

}

}

}



Notice that MyGenericDelegate defines a single type parameter that represents the argu-

ment to pass to the delegate target. When creating an instance of this type, you are required to

specify the value of the type parameter as well as the name of the method the delegate will invoke.

Thus, if you specified a string type, you send a string value to the target method:




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