#899 – Exception Type Variable in a catch Block Is Optional

In a catch block that specifies a particular exception type to catch, you’ll typically include a named variable representing the exception object that is caught.  Using this variable, code within your handler can access information about the exception that was caught.

            try
            {
                Dog d = new Dog("Kirby", 15);
                d.Bark(BarkSound.Woof, 99);
            }
            catch (DogBarkException dbe)
            {
                Console.WriteLine("Kirby didn't bark properly");
                Console.WriteLine(string.Format("Can't bark {0} times", dbe.NumTimes));
            }

If you don’t need to access data within the exception object, but you still want to catch exceptions of a specific type, you can omit the variable.  This will allow you to catch exceptions of a particular type, but not give you any access of data within the exception object.

            try
            {
                Dog d = new Dog("Kirby", 15);
                d.Bark(BarkSound.Woof, 99);
            }
            catch (DogBarkException)
            {
                Console.WriteLine("Kirby didn't bark properly");
            }
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About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

One Response to #899 – Exception Type Variable in a catch Block Is Optional

  1. Pingback: Dew Drop – July 31, 2013 (#1,596) | Alvin Ashcraft's Morning Dew

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