C#殺死進程

private void KillProcess(string processName)
        {
            System.Diagnostics.Process myproc = new System.Diagnostics.Process();
            //得到所有打開的進程
            try
            {
                foreach (Process thisproc in Process.GetProcessesByName("WINPROJ"))
                {
                    if (!thisproc.CloseMainWindow())
                    {
                        thisproc.Kill();
                    }
                }
            }
            catch (System.Exception ex )
            {
                ScriptManager.RegisterStartupScript(this.btnUpload, GetType(), "dis", "alert(進程殺死失敗);", true);
            }
        }