CmisSync.Widgets.UrlWidget.ValidateUrl C# (CSharp) Метод

        private void ValidateUrl(object sender, EventArgs args) {
            if (this.ValidationActivated) {
                if (string.IsNullOrEmpty(this.Url)) {
                    this.isValidUrl = false;
                    this.urlEntry.ModifyText(Gtk.StateType.Normal, RED);
                    this.urlEntry.TooltipText = CmisSync.Properties_Resources.EmptyURLNotAllowed;
                } else if (!this.UrlRegex.IsMatch(this.urlEntry.Text)) {
                    this.isValidUrl = false;
                    this.urlEntry.ModifyText(Gtk.StateType.Normal, RED);
                    this.urlEntry.TooltipText = CmisSync.Properties_Resources.InvalidURL;
                } else {
                    this.isValidUrl = true;
                    this.urlEntry.ModifyText(Gtk.StateType.Normal);
                }
            } else {
                this.urlEntry.ModifyText(Gtk.StateType.Normal);
            }
        }