One attends a meeting or seminar or a conference.
One doesn’t attend to a meeting or seminar …
… but a doctor attends to (treats) a patient.
One participates in a seminar or a conference.
One doesn’t participate to a seminar …
… but one goes to a seminar.
Action results in an outcome.
Action doesn’t result to an outcome.
… but action does lead to an outcome.
Let’s not mix up our prepositions.
… and I don’t have to make a proposition (proposal) out of that.