C# WinRAR解压类

using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.Threading;

namespace DataService_Client
{
    class WinRAR
    {
        private static Process myprocess = new Process();

        public static bool Rar(string sourcePath, string destPath, string lx)
        {
            Process process = new System.Diagnostics.Process();
            process.StartInfo.FileName = "Winrar.exe";
            process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
            process.StartInfo.CreateNoWindow = false;
            string Myinfo = "";

            bool flag = false;            

            try
            {
                if (lx == "0")
                {
                    Myinfo = " a -ep  \"" + destPath + "\" " + "\"" + sourcePath + "\"";
                }
                else
                {
                    Myinfo = " X -o+ " + destPath + " \"" + sourcePath + "\"";
                }

                process.StartInfo.Arguments = Myinfo;
                process.Start();

                Thread.Sleep(3000);

                if (process.HasExited && (process.ExitCode == 0))
                {
                    flag = true;
                }

                KillProcess("WinRAR");
            }
            catch (Exception ex)
            {
                TPCClass.TPCCommonCls.AddErrorMsg("Rar", ex.Message, "WinRAR.txt");
            }


            return flag;
        }

        private static void KillProcess(string processname)
        {
            Process[] processesByName = Process.GetProcessesByName(processname);

            foreach (Process process in processesByName)
            {
                process.Kill();
            }
        }
    }
}