public static void CallPassDataToMethodAndRetrieveUsingCallBackMethod()
{
//Prompt the user to enter target number.
Console.WriteLine("Enter target number:");
//Read from the console and store it in target variable.
int targ = Convert.ToInt32(Console.ReadLine());
//Create an instance of the callback delegate and to its constructor pass the name of the callback function.
SumOfNumberCallBack sumNumberCallback = new SumOfNumberCallBack(PrintSumOfNumbers);
//Create the instance of the number class and to it's constructor pass the target number and instance of the callback delegate.
CallbackDelegateDemoToRetrievData obj = new CallbackDelegateDemoToRetrievData(targ, sumNumberCallback);
//Create an instance of the thread class and specify the Thread function to invoke.
Thread t7 = new Thread(new ThreadStart(obj.ComputeSumOfNumbers));
t7.Start();
}
//callback to initialize the target number and callback delegate.
public CallbackDelegateDemoToRetrievData(int target, SumOfNumberCallBack delcallback)
{
this._target = target;
this._sumOfNumberCallback = delcallback;
}