C # Try-catch-return

Executing a try before executing a statement in Finally,catch may affect the execution of finally

Usefinally block, you can clean up any resources allocated in the try, and you can run the code even if an exception occurs in the try block. Typically, the control leavesAfter the try statement,finally The statement will block the run.  break, continue, goto, or return statement, or of propagation of an exception out of the try statement. "Data-guid=" 20ea8da6dec7e0a184d6e06697d4594b "> normal execution in  break, Continue, goto  or  < span class= "input font-color" >return  statement execution, or   The propagation of an external exception in the try  statement may cause a control conversion to occur.

The handled exception will ensure that the associatedfinally block. However, if the exception is not handled, the execution of the finally block depends on how the exception unwind operation is triggered. This action also depends on how the computer is set up. For more information, see unhandled Exception processing in the CLR (unhandled exception handling in the CLR).

Typically, when an unhandled exception aborts an application, theIt does not matter whether the finally block is running. However, if you have aThe statements in a finally block must run in that environment, a solution is toThe catch block is added to thetry-The finally statement.Alternatively, you can capture the one that may be above the call stacktry-of the Finally statementThe exception that is thrown in the try block.try-finally statement, or in the Method that is calls that method, or an any method in the call stack. "Data-guid=" 91e6e938ad929c777060761090142e2e "> so that the package can be captured Includes  try-finally block depends on whether the operating system chooses to trigger an exception unwind operation . "Data-guid=" 2dd2b088c7abcc5f71bc00b7236b219c "> If no exception is caught,  finally  block depends on whether the operating system chooses to trigger an exception expansion operation.

try-catch-return Order of executionWhether in a try or in a catch, as long as they have a return and the bottom of finally exist at the same time, in the program run finally first to execute finally, and then execute Return,try-catch-return share a local domain (variable in which to remain consistent)

       static void Main ()        {            Console.WriteLine (Test ());            Console.readkey ();        }           static int Test ()        {            int num = 0;            Try            {                num = 1;                throw new Exception ("Manual control throws Exception");                return num;            }            catch (Exception e)            {                Console.WriteLine (e.message);                return num;              }            Finally            {                num++;                Console.WriteLine ("I'm in finally num={0}", num);            }        }

C # Try-catch-return