private void SIGNUP_End_Registration_Click(object sender, RoutedEventArgs e)
        {
            InfoWindow.IsOpen = true;
            var checkNickName = _dal.CheckNickName(SignUp_UserName.Text);

            if (checkNickName == null &&
                SignUp_FullName.Text != string.Empty &&
                SignUp_Password.Password != string.Empty)
            {
                _dal.SignUp_NewUser(SignUp_FullName.Text, SignUp_UserName.Text,
                                    SignUp_Password.Password);
                _dal.LogUser(SignUp_UserName.Text);
                InfoTextBlock.Text       = "Registration was successful!!";
                SignUp_FullName.Text     = string.Empty;
                SignUp_Password.Password = string.Empty;
                SignUp_UserName.Text     = string.Empty;
            }
            else
            {
                if (checkNickName != null)
                {
                    InfoTextBlock.Text = "This User Name was created!";
                }
                if (SignUp_FullName.Text == string.Empty ||
                    SignUp_UserName.Text == string.Empty ||
                    SignUp_Password.Password == string.Empty)
                {
                    InfoTextBlock.Text = "Invalid Data";
                }
            }
        }