### I occasionally get a NullReferenceException, what's wrong? You probably don't check the result status of a call and just assume the data is always there. `NullReferenceExecption`s will happen when you have code like this `var symbol = client.GetTickersAync().Result.Data.Symbol` because the `Data` property is null when the call fails. Instead check if the call is successful like this: ````C# var tickerResult = await client.GetTickersAync(); if(!tickerResult.Success) { // Handle error } else { // Handle result, it is now safe to access the Data property var symbol = tickerResult.Data.Symbol; } ```` ### The socket client stops sending updates after a little while You probably didn't keep a reference to the socket client and it got disposed. Instead of subscribing like this: ````C# private void SomeMethod() { var socketClient = new BinanceSocketClient(); socketClient.Spot.SubscribeToOrderBookUpdates("BTCUSDT", data => { // Handle data }); } ```` Subscribe like this: ````C# private BinanceSocketClient _socketClient = new BinanceSocketClient(); // .. rest of the class private void SomeMethod() { _socketClient.Spot.SubscribeToOrderBookUpdates("BTCUSDT", data => { // Handle data }); } ````