public override void SelectCategory() {
AlertDialog.Builder builderSingle = new AlertDialog.Builder(this.Activity);
builderSingle.SetTitle ("Select Category");
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(
this.Activity,
Android.Resource.Layout.SelectDialogSingleChoice);
arrayAdapter.AddAll (categories.Categories);
builderSingle.SetAdapter (arrayAdapter, this.ItemClicked);
builderSingle.Show ();
}
