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// Create an instance of MyGenericDelegate



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

// Create an instance of MyGenericDelegate

// with string as the type parameter.

MyGenericDelegate strTarget =

new MyGenericDelegate(StringTarget);

strTarget("Some string data");

Given the format of the strTarget object, the StringTarget() method must now take a single

string as a parameter:

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360

8849CH11.qxd  10/1/07  10:43 AM  Page 360




static void StringTarget(string arg)

{

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



}

Simulating Generic Delegates Without Generics

Generic delegates offer a more flexible way to specify the method to be invoked in a type-safe man-

ner. Prior to the introduction to generics (with the release of .NET 2.0), you could achieve a similar

end result using a generic System.Object:

public delegate void MyDelegate(object arg);

Although this allows you to send any type of data to a delegate target, you do so without type

safety and with possible boxing penalties. For instance, assume you have created two instances of

MyDelegate, both of which point to the same method, MyTarget. Note the boxing/unboxing penalties

as well as the inherent lack of type safety:

class Program

{

static void Main(string[] args)



{

...



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