If you intend to visit only one Schengen country, you must apply at the Embassy or Consulate of this country.
If you intend to visit several Schengen countries, you must apply for a visa at the Embassy or Consulate of the country of your longest stay
If you intend to visit several Schengen countries but do not have a main destination (i.e. the duration of your stay is very similar in all the different countries), you should apply for a visa at the Embassy or Consulate of the country that is your first point of entry.
If you intend to visit only one Schengen country, you must apply at the Embassy or Consulate of this country.
If you intend to visit several Schengen countries, you must apply for a visa at the Embassy or Consulate of the country of your longest stay
If you intend to visit several Schengen countries but do not have a main destination (i.e. the duration of your stay is very similar in all the different countries), you should apply for a visa at the Embassy or Consulate of the country that is your first point of entry.