从对话框中调用表单

Question

我有一个简单的表格，

 [Serializable]

class CreateNewLeadForm

{

    public string FirstName;

    public string LastName;

    public static IForm<CreateNewLeadForm> BuildForm()

    {

        return new FormBuilder<CreateNewLeadForm>()

            .Message("Lets create a New Lead")

            .Field(nameof(FirstName))

            .Field(nameof(LastName))

            .Build();

    }

};

还有一个简单的对话框

public class GreetDialog : IDialog<object>

{        

    public async Task StartAsync(IDialogContext context)

    {

        context.Wait(MessageReceivedAsync);

    }

    public   async Task MessageReceivedAsync(IDialogContext context, IAwaitable<Message> argument)

    {

       context.Wait(MessageReceivedAsync);

    }  

}  

如何从主对话框本身调用“启动FormDialog”？总的来说，我们如何在对话框中创建新对话框？