using System;

using System.IO;

​

public class Program

{

    public static void Main()

    {

        try

        {

            //some code

            var filestream = File.Open("filename",FileMode.Open);

            /* kann ArgumentException,

            ArgumentNullException,

            PathTooLongException,

            DirectoryNotFoundException,

            IOException,

            UnauthorizedAccessException,

            ArgumentOutOfRangeException,

            NotSupportedException

            und FileNotFoundException werfen

                */

            //some more code

        }

        catch (FileNotFoundException e)

        {

            Console.WriteLine("FileNotFoundException caught");

            throw new Exception("Something went wrong", e);

        }

​

    }

}