Graphics.CopyFromScreen [Web application] + The handle is invalid

I am using the below code to take print screen of my web page.

      using (Bitmap bitmap = new Bitmap(620, 850))
        {    
            using (Graphics g = Graphics.FromImage(bitmap))
            {
                g.CopyFromScreen(new Point(bounds.Left, bounds.Top), Point.Empty, bounds.Size);
            }
            bitmap.Save(System.AppDomain.CurrentDomain.BaseDirectory.ToString() + 1 + ".JPEG", ImageFormat.Jpeg);
        }

It works fine in the development machine,but once i deploy it in the Server it gives below error

Error Message:

The handle is invalid
Source: System.DrawingError
Stack Trace:    at System.Drawing.Graphics.CopyFromScreen(Int32 sourceX, Int32 sourceY, Int32 des开发者_运维百科tinationX, Int32 destinationY, Size blockRegionSize, CopyPixelOperation copyPixelOperation)    
   at System.Drawing.Graphics.CopyFromScreen(Int32 sourceX, Int32 sourceY, Int32 destinationX, Int32 destinationY, Size blockRegionSize)    
   at System.Drawing.Graphics.CopyFromScreen(Point upperLeftSource, Point upperLeftDestination, Size blockRegionSize)    
   at Secure_SearchReport.btnSearch_Click(Object sender, EventArgs e)    
   at System.Web.UI.WebControls.Button.OnClick(EventArgs e)    
   at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)    
   at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)    
   at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)

Its very urgent. Any suggestion please.......

I would guess the graphics functionality is only available in rich-client applications. (Windows Forms)

This would be a huge security issue if webpages could capture snapshots of users' desktop.

You may try VisualJS.NET, the video under http://www.visualjs.net/Tutorials/WhatisVisualJSNET.aspx page could be helpful. They using Cassini Dev server in addition to built-in VisualJS.NET features in order to demonstrate very simple remote desktop over web application.