C#清除SQL掛起

using Microsoft.Win32; //操作注冊表需要引用的空間PRivate void but_Del_Click(object sender, EventArgs e)        {            //指定路徑            RegistryKey key = Registry.LocalMachine;            RegistryKey SoftKey = key.OpenSubKey("SYSTEM//CurrentControlSet//Control//session Manager", true);            string[] subkeyNames = SoftKey.GetValueNames();            //取得該項下所有鍵值的名稱的序列，并傳遞給預定的數組中            foreach (string keyName in subkeyNames)            {                if (keyName == "PendingFileRenameOperations") //判斷鍵值的名稱                {                    SoftKey.DeleteValue("PendingFileRenameOperations",true);                    MessageBox.Show("清除SQL掛起成功！");                }            }            SoftKey.Close();            key.Close();        }