C#判断系统是32位还是64位

public  String Judge64or32System()
        {
            try
            {
                String addressWidth = String.Empty;
                System.Management.ConnectionOptions mConnOption = new System.Management.ConnectionOptions();
                System.Management.ManagementScope mMs = new System.Management.ManagementScope("\\\\localhost", mConnOption);
                System.Management.ObjectQuery mQuery = new System.Management.ObjectQuery("select AddressWidth from Win32_Processor");
                System.Management.ManagementObjectSearcher mSearcher = new System.Management.ManagementObjectSearcher(mMs, mQuery);
                System.Management.ManagementObjectCollection mObjectCollection = mSearcher.Get();
                foreach (System.Management.ManagementObject mObject in mObjectCollection)
                {
                    addressWidth = mObject["AddressWidth"].ToString();
                }

                return addressWidth;
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
                return String.Empty;
            }
        }