Amoeba.Windows.OptionsWindow._clientFilterAddButton_Click C# (CSharp) Method

        private void _clientFilterAddButton_Click(object sender, RoutedEventArgs e)
        {
            if (_clientFiltersConditionTextBox.Text == "") return;

            try
            {
                var connectionType = (ConnectionType)_clientFiltersConnectionTypeComboBox.SelectedItem;

                var uriCondition = new UriCondition(_clientFiltersConditionTextBox.Text);
                string proxyUri = null;
                string option = null;

                if (!string.IsNullOrWhiteSpace(_clientFiltersProxyUriTextBox.Text))
                {
                    proxyUri = _clientFiltersProxyUriTextBox.Text;
                    if (!Regex.IsMatch(proxyUri, @"^(.+?):(.+)$")) return;
                }

                if (connectionType == ConnectionType.Socks5Proxy
                    || connectionType == ConnectionType.HttpProxy)
                {
                    if (proxyUri == null) return;
                }

                if (!string.IsNullOrWhiteSpace(_clientFiltersOptionTextBox.Text))
                {
                    option = _clientFiltersOptionTextBox.Text;
                }

                var connectionFilter = new ConnectionFilter(connectionType, proxyUri, uriCondition, option);

                if (_clientFilters.Any(n => n == connectionFilter)) return;
                _clientFilters.Add(connectionFilter);
            }
            catch (Exception)
            {

            }

            _clientFiltersListViewUpdate();
        }