Microsoft.Win32.RegistryKey.DeleteSubKey C# (CSharp) Method

        public void DeleteSubKey(string subkey) { }
        public void DeleteSubKey(string subkey, bool throwOnMissingSubKey) { }

        public static void UnregisterFunction(Type t)
        {
            try
            {
                Microsoft.Win32.RegistryKey hklm = Microsoft.Win32.Registry.LocalMachine;
                Microsoft.Win32.RegistryKey hkcu = Microsoft.Win32.Registry.CurrentUser;

                string keyname = "SOFTWARE\\SolidWorks\\Addins\\{" + t.GUID.ToString() + "}";
                hklm.DeleteSubKey(keyname);
#if DEBUG
                keyname = "Software\\SolidWorks\\AddInsStartup\\{" + t.GUID.ToString() + "}";
                hkcu.DeleteSubKey(keyname);
#endif
            }
            catch (System.NullReferenceException nl)
            {
                Console.WriteLine("There was a problem unregistering this dll: " + nl.Message);
                System.Windows.Forms.MessageBox.Show("There was a problem unregistering this dll: \n\"" + nl.Message + "\"");
            }
            catch (System.Exception e)
            {
                Console.WriteLine("There was a problem unregistering this dll: " + e.Message);
                System.Windows.Forms.MessageBox.Show("There was a problem unregistering this dll: \n\"" + e.Message + "\"");
            }
        }