using System;

using System.Data;

​

public class Program

{

    public static void Main()

    {

        try

        {

            try

            {

                throw new VersionNotFoundException("blah");

            }

            catch (VersionNotFoundException e)

            {

                throw new Exception("blah2", e);

            }

        }

        catch (Exception e)when (e.InnerException is VersionNotFoundException e2)

        {

            Console.WriteLine(e2.Message);

        }

        catch (Exception e)

        {

        // VersionNotFoundException gets caught here as an inner exception

        }

    }

}