How can implement class which derived from system.exeption?

Question

I tried to implement that code:

try
{
  CheckDivideByZero(num1, num2);
}
catch (FirstDivideByZeroException)
{
  Console.WriteLine("first number is zero");
}

I need that, FirstDivideByZeroException class will handle that Exeption instead of DevideByZeroExeption.
I tried to do that:

public  class
FirstDivideByZeroException : DivideByZeroException {}

but when i run the application, that message appear:
"An unhandled exception of type 'System.DivideByZeroException' occurred .."

How can i implement that?

sudheer panwar · Answer

u need to catch this exception with DivideByZeroException class and then again throw ur custom exception and catch the newly throwed exception outside the current scope . something like below: try { try { DivideByZero(num1num2); } catch (DivideByZeroException ex) { throw new CustomDivideByZeroException(Custom error ::  + ex.Message); } } catch (CustomDivideByZeroException exx) { MessageBox.Show(exx.Message); } ***** public class CustomDivideByZeroException:System.Exception { public CustomDivideByZeroException(): base () {} public CustomDivideByZeroException( string message): base (message) {} public CustomDivideByZeroException( string message  Exception ex): base (messageex) { } } if anybody know better solution plz post it here.