C#

string command = string.Empty;
            System.Diagnostics.ProcessStartInfo procStartInfo;
            System.Diagnostics.Process proc = new System.Diagnostics.Process();
            command = "net use " + sharedLocation + " //Delete";
            procStartInfo = new System.Diagnostics.ProcessStartInfo("cmd", "/c " + command);
            procStartInfo.RedirectStandardOutput = true;
            procStartInfo.UseShellExecute = false;

            // Do not create the black window.
            procStartInfo.CreateNoWindow = true;

            // Now we create a process, assign its ProcessStartInfo and start it
            proc = new System.Diagnostics.Process();
            proc.StartInfo = procStartInfo;
            proc.Start();
            proc.WaitForExit();

            command = "net use " + sharedLocation + " " + password + @" /user:" + user;
            procStartInfo = new System.Diagnostics.ProcessStartInfo("cmd", "/c " + command);
            procStartInfo.RedirectStandardOutput = true;
            procStartInfo.UseShellExecute = false;

            // Do not create the black window.
            procStartInfo.CreateNoWindow = true;

            // Now we create a process, assign its ProcessStartInfo and start it
            proc = new System.Diagnostics.Process();
            proc.StartInfo = procStartInfo;
            proc.Start();
            proc.WaitForExit();

the calling code:
WebClient wc = new WebClient();
wc.OpenWriteCompleted += (s2, e2) =>
{
   PushData(e2.Result, offset);
   e2.Result.Close();
};
wc.OpenWriteAsync(ub.Uri);

the push data code
private void PushData(Stream output, long offset)
        {
            byte[] buffer = new byte[4096];
            int bytesRead;
            bytesRead = theFileStream.Read(buffer, 0, buffer.Length);
            if (bytesRead != 0)
            {
                output.Write(buffer, 0, bytesRead);
                
                totalBytesDone += bytesRead;
                FireUpdateEvent(bytesRead);
            }
        }