private void Pickwallpaper_Click(object sender, EventArgs e) { var button = sender as Button; using (AndroidX.AppCompat.App.AlertDialog.Builder builder = new AndroidX.AppCompat.App.AlertDialog.Builder(button.Context)) { int currentwallpapersetted = int.Parse(configurationManager.RetrieveAValue(ConfigurationParameters.ChangeWallpaper, "0")); builder.SetTitle(Resources.GetString(Resource.String.changewallpaper)); builder.SetSingleChoiceItems(new string[] { button.Context.GetString(Resource.String.blackwallpaper), button.Context.GetString(Resource.String.defaultwallpaper), button.Context.GetString(Resource.String.pickwallpaper) }, currentwallpapersetted, OnDialogClickEventArgs); builder.Create(); builder.Show(); } }