/// <summary>
/// 异步运行，不用等待。需要考虑：如何清理进程。
/// </summary>
/// <param name="cmd">命令</param>
/// <returns></returns>
public IAsyncResult RunAsyn(string cmd)
{
CmdHandler handler = RunNoReturn;
IAsyncResult result = handler.BeginInvoke(cmd, AsyncProcessExited, null);
return(result);
}
/// <summary>
/// 异步运行，不用等待。
/// </summary>
/// <param name="cmd"></param>
/// <returns></returns>
public void RunAsyn(string cmd)
{
CmdHandler handler = Run;
handler.BeginInvoke(cmd,
null,
null);
}