我发现你没有在firebaseconfig中定义auth密钥。请参阅github project。

IFirebaseConfig config = new FirebaseConfig
{
     AuthSecret = "your-auth-secret",
     BasePath = "<your-firebase-reference-link>.firebaseio.com/"

};

IFirebaseClient client;

client = new FirebaseClient(config);
         await client.OnAsync("FireSharp/Name/", (sender, args) =>
         {
                //Gets the Unique ID and deletes the any other string attached to it
                string dataFromFB = args.Data;
                string paths = args.Path;
                string key = RemoveNameSubstring(paths);
                string uniqueKey = key.Split('/').Last();
                if (keyHolder.ContainsKey(uniqueKey))
                {
                    keyHolder[uniqueKey] = dataFromFB;
                    AddToListView(dataFromFB);
                }
                else
                {
                    keyHolder.Add(uniqueKey, dataFromFB);
                    AddToListView(dataFromFB);
                }
         });