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

        private void DeleteValueCore(string name, bool throwOnMissingValue)
        {
            int errorCode = Interop.Advapi32.RegDeleteValue(_hkey, name);

            //
            // From windows 2003 server, if the name is too long we will get error code ERROR_FILENAME_EXCED_RANGE  
            // This still means the name doesn't exist. We need to be consistent with previous OS.
            //
            if (errorCode == Interop.Errors.ERROR_FILE_NOT_FOUND ||
                errorCode == Interop.Errors.ERROR_FILENAME_EXCED_RANGE)
            {
                if (throwOnMissingValue)
                {
                    ThrowHelper.ThrowArgumentException(SR.Arg_RegSubKeyValueAbsent);
                }
                else
                {
                    // Otherwise, reset and just return giving no indication to the user.
                    // (For compatibility)
                    errorCode = 0;
                }
            }
            // We really should throw an exception here if errorCode was bad,
            // but we can't for compatibility reasons.
            Debug.Assert(errorCode == 0, "RegDeleteValue failed.  Here's your error code: " + errorCode);
        }