How to catch and log exception inside Using statement without using try-catch?

Question

As I know that Using statement has built in implementation of Dispose() and Try-Catch. So I want to know few things

1. Is it possible to log an exception inside using statement without using try-catch block , either inside or outside the statement. If not, then why its built in to the statement.

2. Nested or overuse of try-catch is not preferred, then why such model preferred to use.

           using (some_resource)
           {
               try
               {
               }
               catch
               {
               }
               finally
               {
                   //my exception logging mechanism
               }
           }
   

will become

            try
            {
                try
                {
                }
                catch
                {
                }
                finally
                {
                    //my exception logging mechanism
                }
            }
            catch
            {
            }
            finally
            {
                //some_resource.Dispose()
            }

Answer 1

A using statement involves try/finally; there is no catch. But frankly, your concern is overkill; multiply-nested and complex try/catch/finally is "undesirable" because:

• it makes the code hard to read
• and even harder to get right (most people get it wrong, alas)
• it is frequently misused
• it suggests your method is doing too much

With using, this isn't an issue; it makes the intent very clean, without adding complexity or concern.

I would just use:

using (some_resource) {
    try {
        // some code
    } catch (Exception ex) {
        LogIt(ex);
        throw;
    }
}