static MediaFileConverter() { foreach (var p in new[] { "tools", @"tools\tttool-win32-1.6", @"tools\mpg123-1.22.0-x86-64" }) { var d = Path.Combine(PathUtil.GetDirectory(), p); if (!Directory.Exists(d)) { throw new System.IO.FileNotFoundException(d); } PathUtil.AddToPath(d); } }