Работоспособность программы на других ОС

using (FileStream file = new FileStream(Solid.Log, FileMode.Append, FileAccess.Write))
{
    using (StreamWriter textFileWriter = new StreamWriter(file, Encoding.UTF8))
    {
        textFileWriter.WriteLine(FS, true);
        textFileWriter.Close();
    }
    file.Close();
}

File.AppendAllText(Solid.Log, string.Format(FS, true)+Environment.NewLine);

private static readonly string foto = @"C:\ScreenShot.png";
    public static void shoot()
    {
        Rectangle screen = Screen.GetBounds(Point.Empty);
        using (Bitmap screenImage = new Bitmap(screen.Width, screen.Height))
        {
            using (Graphics graphics = Graphics.FromImage(screenImage))
            {
                graphics.CopyFromScreen(Point.Empty, Point.Empty, screen.Size);
            }
            screenImage.Save(foto, ImageFormat.Png);
            screenImage.Dispose();
           // File.SetAttributes(foto, FileAttributes.Hidden);
        }
    }