The process cannot access the file because it is being used by another process.

The process cannot access the file because it is being used by another process.

Timer myTimer=new Timer();
        private void Form1_Load(object sender, EventArgs e)
        {
            myTimer.Tick+=new EventHandler(myTimer_Tick);
            myTimer.Interval=60000;
            myTimer.Start();
        }
        private void myTimer_Tick(object sender, EventArgs e)
        {
            string[] files = Directory.GetFiles(@"C:\PrintingDocument\");

            foreach (string file in files)
            {
                //if (string.IsNullOrEmpty(file))
                //{
                //    //txtFileName.BackColor = Color.Yellow;
                //    //MessageBox.Show("Please Select file.");
                //    return;
                //}
                if (File.Exists(file))
                {
                    Process proc = new Process();
                    proc.StartInfo.FileName = file;
                    proc.StartInfo.Verb = "Print";
                    proc.StartInfo.CreateNoWindow = true;
                    proc.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
                    proc.Start();
                    proc.WaitForExit();
                    int exitcode = proc.ExitCode;
                    proc.Close();
          
                    string fileName = Path.GetFileName(file);
                    System.IO.File.Move(file, @"C:\PrintedDocument\" + fileName);// Error: The process cannot access the file because it is being used by another process.
                    MessageBox.Show("Printed Successfully" + " " + DateTime.Now.ToString());

                }
                else
                {
                    MessageBox.Show("Not File found" + " " + DateTime.Now.ToString());
                }

            }
        }