#1,193 – yield Statement and try/catch Blocks

The yield return statement is used when defining an iterator to generate the next element within a sequence (IEnumerable).  You cannot include a yield return statement in any of the following places:

  • within a try block that has a catch clause
  • within a catch block
  • within a finally block

You can include a yield return statement within a try block that only has a finally block.

        private static IEnumerable<int> IntsAndTheirDoubles()
        {
            for (int i = 1; i <= 5; i++ )
            {
                yield return i;
                try
                {
                    // Error: Cannot yield a value in the body of a try block
                    //   with a catch clause
                    yield return 2 * i;
                }
                catch (Exception xx)
                {
                    Console.WriteLine("Uh-oh");
                }
            }
        }
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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.

2 Responses to #1,193 – yield Statement and try/catch Blocks

  1. Pingback: Dew Drop – September 30, 2014 (#1866) | Morning Dew

  2. Steven says:

    Good to know. Thanks!

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