private bool UploadFile(string source,string targetUrl,NetworkCredential networkCredential)
        {
            FileStream streamSource;
            Stream streamTarget;
            WebClient client = new WebClient();
            client.Credentials = networkCredential;
            try
            {
                streamSource = File.OpenRead(source);
            }
            catch (Exception err)
            {
                return false;
            }
            try
            {
                Uri url = new Uri(targetUrl);
                streamTarget = client.OpenWrite(url, "PUT");
            }
            catch (Exception err)
            {
                return false;
            }
            try
            {
                long num = 0;
                int count = 0;
                byte[] buffer = new byte[512];
                while (num < streamSource.Length)
                {
                    count = streamSource.Read(buffer, 0, 512);
                    streamTarget.Write(buffer, 0, count);
                    num += count;
                    
                }
                streamTarget.Close();
                streamSource.Close();
                return true;
            }
            catch (Exception err)
            {
                return false;
            }
        }