System.Net.CredentialCache MyCredentialCache = new System.Net.CredentialCache();
MyCredentialCache.Add( new System.Uri("http://MyServer/MyApp/Temp/"), "NTLM",	new System.Net.NetworkCredential(strUserName, strPassword, strDomain));

WebClient Client = new WebClient();

Client.Credentials = MyCredentialCache;

byte[] responseArray = Client.UploadFile("http://MyServer/MyApp/Temp/","POST","C:\\TEMP\\FileToUpload.doc");

Console.WriteLine("\nResponse Received.The contents of the file uploaded are: \n{0}",Encoding.ASCII.GetString(responseArray));