How to catch multiple exceptions at once in C#

• By the use of following program we can return multiple catches like Format Exceptions and overflow exceptions...........

 static void Main(string[] args)  
     {  
       ;  
       try  
       {  
       }  
       catch (Exception ex)  
       {  
         if (ex is FormatException || ex is OverflowException)  
         {  
           WebId = Guid.Empty;  
           return;  
         }  
         throw;  
       }  
     }