what happens if there is exception thrown in catch block ...will another catch block catch that exception? have look the below code

Question

User1094269964 posted

lets say i have function

 public void DoWork()
        {
            try
            {
                throw CustomException("Testing");
            }
            catch (CustomException ex)      // Catch 1
            {
                throw new Exception(ex.Message);
            }
            catch (Exception ex) //Catch2
            {
                /*
                 * Will the exception thrown in Catch 1 will be catched in Catch2 ?
                 */
            }
        }

Answer 1

User-1360095595 posted

No. Only the first catch. Only one catch block will be hit. 

Answer 2

User-434868552 posted

@bsurendiran   welcome to forums.asp.net

if you do not have a try/catch, exceptions will be caught at some higher level in the call stack, or missed altogether and caught by the operating system ~~ worst case scenario, if the operating system can not catch the exception, you likely will crash your computer.

Think of an exception as a bubble from the bottom of the ocean; as it bubbles up to the surface, it may get trapped on the way up to the top.

important, exceptions are hierarchical; for that reason, when you have multiple catch blocks, you stack them from more specific to less specific, if you try to stack them the wrong way around, the c# compiler will not let you.

    try
    {	        
    }
    catch (Exception ex)
    {
    }
    catch (DivideByZeroException zdivex)  // error
    {
    }

error:  A previous catch clause already catches all exceptions
       of this or of a super type ('System.Exception')

reference:  http://msdn.microsoft.com/en-us/library/5b2yeyab%28v=vs.110%29.aspx
                "Handling and Throwing Exceptions"

edit:

you can throw and/or rethrow exceptions.  see http://www.dotnetperls.com/throw  (generally, you should be careful so as to not mess up your StackTrace data.)

end edit.