Execute multiple command lines with the same process using .NET

I'm trying to execute multiple commands without create a new process each time. Basically, I want to start the DOS command shell, switch to the MySQL command shell, and execute a command. Here's how I am calling the procedure (also below). Also, how do I handle the "\"'s in the command?

ExecuteCommand("mysql --user=root --password=sa casemanager", 100, false);

ExecuteCommand(@"\. " + Environment.CurrentDirectory + @"\MySQL\CaseManager.sql", 100, true);

private void ExecuteCommand(string Command, int Timeout, Boolean closeProcess)
{
    ProcessStartInfo ProcessInfo;
    Process Process;

    ProcessInfo = new ProcessStartInfo("cmd.exe", "/C " + Command);
    ProcessInfo.CreateNoWindow = false;
    ProcessInfo.UseShellExecute = false;
    Process = Process.Start(ProcessInfo);
    Process.WaitForExit(Timeout);

    if (closeProcess == true) { Process.Close(); }
}

You can redirect standard input and use a StreamWriter to write to it:

        Process p = new Process();
        ProcessStartInfo info = new ProcessStartInfo();
        info.FileName = "cmd.exe";
        info.RedirectStandardInput = true;
        info.UseShellExecute = false;

        p.StartInfo = info;
        p.Start();

        using (StreamWriter sw = p.StandardInput)
        {
            if (sw.BaseStream.CanWrite)
            {
                sw.WriteLine("mysql -u root -p");
                sw.WriteLine("mypassword");
                sw.WriteLine("use mydb;");
            }
        }

const string strCmdText = "/C command1&command2";
Process.Start("CMD.exe", strCmdText);