I have an upcoming travel for a conference in country A. But their consulate is pretty busy and I would like to get my visa sooner.
Can I go to the consulate of a different country B which doesn't need appointment for visa applications and get my visa from there? I can schedule to be in A for 5 days and in B for 7 days.
What if I change my plans later not to visit country B at all and go a country C or just stay in A the whole time? Will there be issues when entering or exiting Schengen states?
EDIT: I called consulate of country B and talked with the visa officer. He told me since you are visiting country A for a conference that is your main destination even though you spend more time in A. He said the rules say: 1. main destination 2. if no, longest stay 3. if no, entrance. He told me that he is reluctant to issue me a visa and asked me to contact country A's consulate, if they don't take the application he will review it.
I called consulate of country A. First the operator told me to go to B then after telling her that I am going to A for business (conference), she told me that I should apply at theirs (A).
Looks like the key thing here is the conference not where I spend most of my time.