How to catch all exceptions in c using try and catch

Question

I want to write some try and catch that catch any type or exception  is this code is enough  that s the way to do in Java    try   code       catch  Exception ex      Or should it be  try   code       catch

User · Answer

static void Main string   args                AppDomain CurrentDomain UnhandledException    CurrentDomain UnhandledException             static void CurrentDomain UnhandledException object sender  UnhandledExceptionEventArgs e                throw new NotImplementedException

User · Answer

Both ways are correct   If you need to do something with the Exception object in the catch block then you should use  try          code       catch  Exception ex      and then use ex in the catch block   Anyway  it is not always a good practice to catch the Exception class  it is a better practice to catch a more specific exception - an exception which you expect

User · Answer

Both approaches will catch all exceptions  There is no significant difference between your two code examples except that the first will generate a compiler warning because ex is declared but not used   But note that some exceptions are special and will be rethrown automatically      ThreadAbortException is a special exception that can be caught  but it will automatically be raised again at the end of the catch block    http   msdn microsoft com en-us library system threading threadabortexception aspx    As mentioned in the comments  it is usually a very bad idea to catch and ignore all exceptions  Usually you want to do one of the following instead    Catch and ignore a specific exception that you know is not fatal   catch  SomeSpecificException           Ignore this exception     Catch and log all exceptions   catch  Exception e           Something unexpected went wrong      Log e          Maybe it is also necessary to terminate   restart the application     Catch all exceptions  do some cleanup  then rethrow the exception   catch       SomeCleanUp        throw       Note that in the last case the exception is rethrown using throw  and not throw ex

User · Answer

try                 catch Exception ex                   the Exception ex means all the exceptions

User · Answer

Both are fine  but only the first one will allow you to inspect the Exception itself   Both swallow the Exception  and you should only catch exceptions to do something meaningfull  Hiding a problem is not meaningful

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I catch all the exceptions and store it in database  so errors can be corrected easily - the page  place  date etc stored  try           Cart   DB BuyOnlineCartMasters Where c   gt  c CmpyID    LoginID  amp  amp  c Active    true  FirstOrDefault      catch  Exception e        ErrorReport StoreError  CartMinifiedPartial-Company   e         -- storing the error for reference     Storing  public static void StoreError string ErrorPage  Exception e                try                       eDurar Models db edurarEntities1 DB   new Models db edurarEntities1                eDurar Models ErrorTable Err   new eDurar Models ErrorTable                Err ErrorPage   ErrorPage              if  e Message    null                                Err ErrorDetails   e Message                            if  e InnerException    null                                Err InnerException   e InnerException Message ToString                               Err Date   TimeZoneInfo ConvertTimeFromUtc DateTime UtcNow  TimeZoneInfo FindSystemTimeZoneById  India Standard Time                 DB ErrorTables AddObject Err               DB SaveChanges

User · Answer

Note that besides all other comments there is a small difference  which should be mentioned here for completeness   With the empty catch clause you can catch non-CLSCompliant Exceptions when the assembly is marked with  RuntimeCompatibility WrapNonExceptionThrows   false    which is true by default since CLR2    1  2  3    1  http   msdn microsoft com en-us library bb264489 aspx   2  http   blogs msdn com b pedram archive 2007 01 07 non-cls-exceptions aspx   3  Will CLR handle both CLS-Complaint and non-CLS complaint exceptions

[c#] How to catch all exceptions in c# using try and catch?

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