AjTalk.Machine.GetFilename C# (CSharp) Метод

        private string GetFilename(string filename)
        {
            if (Path.IsPathRooted(filename) || currentPath == null)
                if (File.Exists(filename))
                    return filename;
                else
                    return null;

            string newname = Path.Combine(currentPath, filename);

            if (File.Exists(newname))
                return newname;

            newname = Path.Combine(".", filename);

            if (File.Exists(newname))
                return newname;

            return null;
        }