Saga 2.1

Account.cs

public Task ReceiveAsync(IContext context)
{
    switch (context.Message)
    {
        // ...
        case Credit msg:
            return AdjustBalance(msg.ReplyTo, msg.Amount);
        case Debit msg when msg.Amount + _balance >= 0:
            return AdjustBalance(msg.ReplyTo, msg.Amount);
        // ...
    }
    return Actor.Done;
}