C＃命令删除：空间文件名

Question

＆＃34; ents.dll＆＃34;删除但是＆＃34; fast race.exe＆＃34;没有删除。我觉得有空间。请帮帮我。

System.Diagnostics.Process process = new System.Diagnostics.Process();
System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();
startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
startInfo.FileName = "cmd.exe";


         startInfo.Arguments = "/C  del  ents.dll + fast race.exe";
         process.StartInfo = startInfo;
         process.Start();