C# ILIST NERELERDE KULLANıLıYOR IçIN 5-İKINCI TRICK

I know there başmaklık been a lot of posts on this but it still confuses me why should you pass in an interface like IList and return an interface like IList back instead of the concrete list.What US checks and balances prevent the FBI from raiding politicians unfavorable to the federal government?Edit: You do need to be quick to get answers in h