Microsoft Bot Framework: Exception: The data is changed

Question

I have a bot with the following conversation scenario:

1. Send text to LUIS
2. LUIS intent calls context.Call(...) to launch a Dialog

Answer 1

I agree with @Artem (this solved my issue too, thanks!). I would just add the following guideline.

Use

var data = context.UserData;
data.SetValue("field_name", false);

whenever you have a IDialogContext object available, so you let the Bot Framework commit changes.

Use instead

StateClient sc = activity.GetStateClient();
await sc.BotState.SetUserDataAsync(activity.ChannelId, activity.From.Id, userData);

when you don't have an IDialogContext object, e.g. in the MessageController class.