private void Button1_Click(object sender, System.EventArgs e)
    {
      try 
      {
        if ((! (Lfile.PostedFile == null)) && (Lfile.PostedFile.ContentType.Substring(0, 5) == "image"))
        {
          HttpImgUpload objUpload = new HttpImgUpload (Lfile.PostedFile, System.Configuration.ConfigurationSettings.AppSettings["UploadFolder"], "test.jpg", 250000, 300, 300); 
          objUpload.DestinationFolder = System.Configuration.ConfigurationSettings.AppSettings["UploadFolder"]; // opzionale 
          objUpload.ImageFilename = "test.jpg"; // opzionale 
          objUpload.Format = System.Drawing.Imaging.ImageFormat.Jpeg;
          objUpload.SaveImage();
        }
        else
        {
          Msg.Text="La if va su else";
        }
      }
      catch
      {
        Msg.Text="il true della if manda tutto in crash";
      }
      finally
      {
        Msg.Text="Upload NON eseguito mi sa che va in crash pure il chatch";
      }
    }

Server Error in '/upload2' Application.
--------------------------------------------------------------------------------

File or assembly name System.Drawing, or one of its dependencies, was not found. 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.IO.FileNotFoundException: File or assembly name System.Drawing, or one of its dependencies, was not found.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Assembly Load Trace: The following information can be helpful to determine why the assembly 'System.Drawing' could not be loaded.

HttpImgUpload objUpload = new HttpImgUpload (Lfile.PostedFile, System.Configuration.ConfigurationSettings.AppSettings["UploadFolder"], "foto1.jpg", 25000, 300, 300);