How to convert to XImage without using System.Drawing.Image with the webplayer

Hi, I am having problems creating a PDF Screenshot with text data. What I am planing on doing is creating a screenshot and printing it into a PDF File, which is opened in a new window. My Problems are: Changing the image file from Bytes[] -> Stream -> XImage. Calling the new PDF in a new Tab / Window.

Ive got all this working fine on the Stand alone Server, but not on the Web Player version. Is there any way that I can use parts of system.drawing.image? or to save the files in temp_internet_files or something like that.

I can convert the Screenshot to a PNG or Stream, but not to an Image file, which I need for the PDF. I am using PDFSmart to create the PDF (are there any other PDF Creators with which I can easily add Image files without converting them?). Then I need to open the PDF in a new browser tab. I have seen some examples with ASP pages which I dont have and I can't get RESPONSE to work either, I guess System.Web is somehow not working either or different.

Here is my code:

    using UnityEngine;
using System;
using System.ComponentModel;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Configuration;
using System.Web;

// using System.Web.UI; // using System.Web.UI.WebControls; // using System.Web.UI.WebControls.WebParts; // using System.Web.UI.HtmlControls;

using System.Net; using PdfSharp; using PdfSharp.Drawing; using PdfSharp.Pdf; using PdfSharp.Pdf.IO; using PdfSharp.Drawing.Layout; using PdfSharp.Pdf.Advanced;

 void pdfDrawHeader(Texture2D pngTexture){
     MemoryStream ms = new MemoryStream(pngTexture.EncodeToPNG());
     Bitmap bmp = (Bitmap)Image.FromStream(ms, true, true);
     XImage image = XImage.FromGdiPlusImage(bmp);

     PdfDocument document = new PdfDocument();
     // Create an empty page
     PdfPage page = document.AddPage();
     // Get an XGraphics object for drawing
     XGraphics gfx = XGraphics.FromPdfPage(page);

     //..Some PDF Creation

     double factor = 1.0f;

     double width = image.PixelWidth;
     double height = image.PixelHeight;

     if(width > 480.0f){
         factor = width / 480.0f;
     }

     if(height > 360.0f && (height / 360.0f)>factor){
         factor = height / 360.0f;
     }

         if(factor==0.0f)
             factor=1.0f;
     width /= factor;
     height /= factor;


     gfx.DrawImage(image, (pdfwidth-hspace*2)*0.5-(width*0.5),vspace,width,height);
     imageHeight = vspace+height;

     MemoryStream stream = new MemoryStream();
     document.Save(stream, false);

     Response.Clear();
     Response.ContentType = "application/pdf";
     Response.AddHeader("content-length", stream.Length.ToString());
     Response.BinaryWrite(stream.ToArray());
     Response.Flush();

     stream.Close();
     Response.End();
 }

}

I could load the image file to the server and read it againg from there, but I would have the problem that 'XImage image = XImage.FromFile' only opens local files.

Does anyone have an idea how I could solve this problem?