private void ExecuteMainDialog(IStatePropertyAccessor <DialogState> dlgstate)
{
var waterFallSteps = new WaterfallStep[]
{
RunMainDialog,
EndMainDlg
};
_dialogSet = new DialogSet(dlgstate);
_dialogSet.Add(new TextPrompt("text"));
_dialogSet.Add(new NumberPrompt <int>("number"));
_dialogSet.Add(new ChoicePrompt("choice"));
_dialogSet.Add(new ExecuteChildDialog(nameof(UserForm), UserForm.PromptProperties()));
_dialogSet.Add(new ExecuteChildDialog(nameof(PizzaOrder), PizzaOrder.PromptProperties()));
_dialogSet.Add(new ExecuteChildDialog(nameof(RootDialog), RootDialog.PromptProperties()));
_dialogSet.Add(new WaterfallDialog("main", waterFallSteps));
}