public int Calculate(CalculationPerformedHandler del, int num1, int num2)
{
if (del != null)
{
return(del(num1, num2));
}
else
{
throw new ApplicationException();
}
}
public void RunDelegateExample()
{
var addDel = new CalculationPerformedHandler(Add);
var subtractDel = new CalculationPerformedHandler(Subtract);
var multiplyDel = new CalculationPerformedHandler(Multiply);
var divideDel = new CalculationPerformedHandler(Divide);
Console.WriteLine($"Add {addDel?.Invoke(2, 2)}");
Console.WriteLine($"Substract {subtractDel?.Invoke(2, 2)}");
Console.WriteLine($"Multiply {multiplyDel?.Invoke(2, 2)}");
Console.WriteLine($"Divide {divideDel?.Invoke(2, 2)}");
Console.WriteLine($"Calculate Add {Calculate(addDel, 2, 2)}");
}
