PERWAPI.PEReader.GetFile C# (CSharp) Method

        private static System.IO.FileStream GetFile(string filename)
        {
            if (Diag.DiagOn) {
                Console.WriteLine("Current directory is " + System.Environment.CurrentDirectory);
                Console.WriteLine("Looking for file " + filename);
            }
            if (System.IO.File.Exists(filename)) {
                return System.IO.File.OpenRead(filename);
            } else
                throw(new System.IO.FileNotFoundException("File Not Found",filename));
        }