Apologies for not following the template, but it didn't really apply.

The class level documentation on FSMBase.SubscribeTransitionCallback doesn't make sense. It looks like the author copied the wrong type names in a couple of places.

See: https://github.com/akkadotnet/akka.net/blob/dev/src/core/Akka/Actor/FSM.cs#L157

/// <summary>
/// Send this to an <see cref="SubscribeTransitionCallBack"/> to request first the <see cref="UnsubscribeTransitionCallBack"/>
/// followed by a series of <see cref="Transition{TS}"/> updates. Cancel the subscription using
/// <see cref="CurrentState{TS}"/>.
/// </summary>
public sealed class SubscribeTransitionCallBack

• Send this to an SubscribeTransiitionCallback should probably be to an FSM
• ...to request first the UnsubscribeTransitionCallback - not sure what this is trying to tell me
• Cancel the subscription using CurrentState<TS> - unsubscribe using UnsubscribeTransitionCallback