Create image dynamically for testing

imagegenerator.cs

public static MemoryStream CreateTempImage(int width, int height)  
{
  using (var image = new Bitmap(width, height, PixelFormat.Format32bppArgb))  
  {  
    string text = String.Format("{0:s}", DateTime.Now);  
    Graphics graphics = Graphics.FromImage(image);  
    var brush = new SolidBrush(Color.Red);  
    graphics.FillRectangle(brush, 0, 0, image.Width, image.Height);  
   
    var font = new Font("Arial", 18, FontStyle.Bold);  
    var textBrush = new SolidBrush(Color.White);  
    var format = new StringFormat { Alignment = StringAlignment.Center };  
    graphics.DrawString(text, font, textBrush, width / 2, height / 2, format);  
   
    var stream = new MemoryStream();  
    image.Save(stream, ImageFormat.Bmp);  
    stream.Position = 0;  
    return stream;  
  }
}