Processing specific exception in C#

It is necessary to process a specific exception type and re-throw the exception next.

This code will process a specific exception Exception1, but section finally will be processed in any case:

            try
           {
               throw exp;
           }
           catch (Exception1)
           {
               Console.WriteLine("catched Exception1 ");
               throw;
           }
           finally
           {
               Console.WriteLine("finally");
           }

Correct code to process a specific exception should be next:

try
{
   throw exp;
}
catch (Exception1)
{
   Console.WriteLine("catched Exception1 ");
   throw;
}
catch (Exception e)
{
   Console.WriteLine("catched not Exception1");
}

See console output of these samples: