using System;               

public class Program

{

//  output:Compilation error (line 15, col 9): A previous catch clause already catches all exceptions of this or of a super type ('System.Exception')

    public static void Main()

    {

        int n1=30; int n2=0;

        try

        {

            Console.WriteLine(n1/n2);       

        }

        catch(Exception ex)

        {

            Console.WriteLine("ss");

        }

        catch(DivideByZeroException) 

        {

            Console.WriteLine("division by zero: {0}", n1);

        }       

    }

}