解析在C＃中检索数据的异步方法，如何访问数据

Im trying to retrieve a simple query on parse and add the content on a custom adapter but i can figure it how, i see from the documentation that only with async i can get the data, but how i can add the data after to the adapter if the async method always return void? This is what im trying and is not workingIm trying to retrieve a simple query on parse a