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how to write the wcf asynchronous methods

Posted By:      Posted Date: October 11, 2010    Points: 0   Category :ASP.Net


i am developing the method in wcf as asynchronous but they can't work i am use

    int add(int x,int y);
    [OperationContract(AsyncPattern = true)]
    IAsyncResult Beginadd(int x,int y,AsyncCallback callback,object state);
    int Endadd(int x, int y, IAsyncResult result);

but it will not work if you have any resources plz provide me any link also

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