What is the difference between IPL and ICL?

I don’t know the reason why all the cricket boards are banning their own players who are playing in ICL. What wrong in that?

ICL only initiated this league. They are the one who introduced this scheme to India. By seeing this only, BCCI introduced IPL. Both IPL and ICL has the same set of rules, same kind of match, both includes foreign player and local player, both are offering good pay to players. Then what made you to ban the players who are all playing in ICL.