Why can't I stop on this breakpoint in a BeforeSend callback?

[fpw23]

I am trying to a prefix to all sentry transaction names using the BeforeSend callback but it is not working. I am doing something similar in the javascript sdk and it works fine. Am I doing something wrong?

In my code I can always hit the first breakpoint be never the second one.

[mattjohnsonpint]

Only error events will call BeforeSend. You would need BeforeSendTransaction, which we have on our backlog with #2077.

You could try using a transaction processor instead, such as:

public class PrefixTransactionNameProcessor : ISentryTransactionProcessor
{
    private readonly string _namePrefix;

    public PrefixTransactionNameProcessor(string namePrefix)
    {
        _namePrefix = namePrefix;
    }

    public Transaction Process(Transaction transaction)
    {
        ((IEventLike)transaction).TransactionName = $"{_namePrefix} - {transaction.Name}";
        return transaction;
    }
}

You'd add it to the options with:

o.AddTransactionProcessor(new PrefixTransactionNameProcessor(namePrefix));