Saving A Bitmap object to a JPEG File

[WebMethod]
    public void SendEasterEgg(string pixelData)
    {
        int width = 374;
        int height = 354;
        Bitmap bmp = null;   
  
        string curPixelColor = String.Empty;   
  
        int x = 0;   
        int y = 0;
 
        if (pixelData != String.Empty)   
        {   
            // Here we create a Bitmap object that has the same size as the one in Flash   
            bmp = new Bitmap(width, height);   
  
            // Iterate through each group of six characters and convert them to a Color   
            // then assign that color to the pixel of the Bitmap object   
            for (int i = 0; i < pixelData.Length / 6; i++)   
            {   
                curPixelColor = pixelData.Substring(i * 6, 6);   
                bmp.SetPixel(x,y, ColorTranslator.FromHtml("0x" + curPixelColor));   
  
                if(x==width-1)   
                {   
                    x = 0;   
                    y++;   
                }   
                else  
                {   
                    x++;   
                }   
            }   
 
            //
            // TODO: Save Bitmap File to Jpeg
            //
        }