How to retrieve the security descriptor of a message by using the HttpWebRequest class and the HttpWebResponse class in Visual C# (313127)

MORE INFORMATION

1. Start Microsoft Visual Studio .NET or Microsoft Visual Studio 2005.
2. On the File menu, point to New, and then click Project.
3. Under Project Types, click Visual C# Projects.
   
   Note In Visual Studio 2005, click Visual C# under Project Types.
4. Under Templates, click Console Application, and then click OK.
   
   In Visual Studio .NET, Class1.cs is created by default. In Visual Studio 2005, Program.cs is created by default.
5. In the code window, replace the existing code with the following:

   using System;
   using System.Net;
   using System.IO;   
   
   namespace WebDavNET
   {
    /// <summary>
    /// Summary description for Class1.
    /// </summary>
    class Class1
    {
     static void Main(string[] args)
     {
      try 
      {
       // TODO: Replace with the URL of an object on Exchange 2000.
       string sUri = "http://ExchServer/Public/MyFolder/Test.EML";
   
       System.Uri myUri = new System.Uri(sUri);
       HttpWebRequest HttpWRequest = (HttpWebRequest)WebRequest.Create(myUri);
   
       string strSDType = "descriptor";
       string sQuery;
       sQuery = "<?xml version='1.0' encoding='utf-8'?>" + 
        "<propfind xmlns=\"DAV:\">" + 
        "<prop xmlns:r=\"http://schemas.microsoft.com/exchange/security/\">" + 
        "<isfolder/>" + 
        "   <r:" + strSDType + "/>" + 
        "</prop>" + 
        "</propfind>";
   
       // Set credentials.
       // TODO: Replace with appropriate user credentials.
       NetworkCredential myCred = new NetworkCredential(@"DomainName\UserName", "Password");
       CredentialCache myCredentialCache = new CredentialCache();
       myCredentialCache.Add(myUri, "Basic", myCred);
       HttpWRequest.Credentials = myCredentialCache;
   
       //Uncomment the following statement and comment the previous four statements if you 
       //use Integrated Windows authentication.
       //httpWRequest.Credentials = CredentialCache.DefaultCredentials
   
       //Note: In Basic type authentication, the user name and password are sent as base64-encoded text and are
       //easily decoded. To help protect the user name and password, we recommend that you
       //use SSL when you use Basic authentication.
   
       // Set headers.
       HttpWRequest.KeepAlive = false;
       HttpWRequest.Headers.Set("Pragma", "no-cache");
       HttpWRequest.ContentType =  "text/xml";
       HttpWRequest.Headers.Set("Translate", "f");
       HttpWRequest.Headers.Set("Depth", "0");
       HttpWRequest.ContentLength = sQuery.Length;
   
       //Set the request timeout to five minutes.
       HttpWRequest.Timeout = 300000;
       // set the request method
       HttpWRequest.Method = "PROPFIND";
   
       // Store the data in a byte array.
       byte[] ByteQuery = System.Text.Encoding.ASCII.GetBytes(sQuery);
       HttpWRequest.ContentLength = ByteQuery.Length;
       Stream QueryStream = HttpWRequest.GetRequestStream();
       // write the data to be posted to the Request Stream
       QueryStream.Write(ByteQuery,0,ByteQuery.Length);
       QueryStream.Close();
   
       // Send the request and get a response. 
       HttpWebResponse HttpWResponse = (HttpWebResponse)HttpWRequest.GetResponse();
       
       // Get the status code.
       int iStatCode =  (int)HttpWResponse.StatusCode;
       string sStatus = iStatCode.ToString();
       Console.WriteLine("Status Code: {0}", sStatus);
       // Get the request headers
       string sReqHeaders = HttpWRequest.Headers.ToString();
       Console.WriteLine(sReqHeaders);
   
       // Read the response stream.
       Stream strm = HttpWResponse.GetResponseStream();
       StreamReader sr = new StreamReader(strm);
       string sText = sr.ReadToEnd();
       Console.WriteLine("Response: {0}", sText);
   
       // Close the stream.
       strm.Close();
   
       // Clean up.
       myCred = null;
       myCredentialCache = null;
       HttpWRequest = null;
       HttpWResponse = null;
       QueryStream = null;
       strm = null;
       sr = null;
          
      }
      catch (Exception e)
      {
       Console.WriteLine("{0} Exception caught.", e);
      }
     }
    }
   }

6. Search for "TODO" in the code, and then modify the code for your environment.
7. Press F5 to build and to run the program.
8. Make sure that the security descriptor property for the object has been received from the response stream.