求一个解决方法，线程

Question

FileWord类里面写了一个放发，用来调用一个进程：
C# code
        #region 调用引擎
        public void UseExe()
        {
            System.Diagnostics.Process p = new System.Diagnostics.Process();
            p.StartInfo.FileName = "..\\..\\engine\\engine.exe";
            p.StartInfo.Arguments = "..\\..\\engine\\return.txt 1";
            
            p.StartInfo.CreateNoWindow = true;
            p.StartInfo.UseShellExecute = false;
            p.Start();
            while (true)
            {
                if (p.HasExited ==true )
                {
                    UI.Main.thread_1.Abort();
                    break;
                }
               
            }
        }
        #endregion
       
FileHelper类里面写了一个方法用来复制文件：
C# code
 #region 文件拷贝
        public void CoypeFile()
        {
            try
            {
                using (StreamReader reader = new StreamReader("..\\..\\engine\\return.txt", Encoding.UTF8))
                {
                    string burider = reader.ReadToEnd();
                    reader.Dispose();
                    reader.Close();
                    if (_yesNo == "yes")
                    {
                        using (StreamWriter writer = new StreamWriter(_filepath, false))
                        {
                            writer.Write(burider);
                            writer.Dispose();
                            writer.Close();
                        }
                    }
                    else if (_yesNo == "No")
                    {
                        using (StreamWriter myWriter = new StreamWriter(_filepath, true))
                        {
                            myWriter.Write(burider);
                            myWriter.Dispose();
                            myWriter.Close();
                        }
                    }
                }
            }
            catch (Exception)
            {
                throw;
            }
        }
        #endregion
前台主窗体，当点击一个按钮的时候，要调用FileWord类里面写的一个方法，用来调用一个进程，当进程结束的时候要调用
FileHelper类里面写一个方法用来复制文件，
该怎样实现？

Answer 1

直接在 button 的事件中写上这两个方法可以么。。UseExe();
CoypeFile();
调用进程的方法用的死循环，没结束之前应该不会跳到下面的代码吧。。

Answer 2

System.Threading.Thread thread1 = new System.Threading.Thread(delegate()
{});
thread1.Start();
while (true)
{
if (thread1.ThreadState != System.Threading.ThreadState.Stopped) continue;
break;
}

Answer 3

用AutoResetEvent去控制同步问题