What is the difference between IQueryable and IEnumerable?

Question

What is the difference between IQueryable and IEnumerable?

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See also What\'s the difference between IQueryable and I

Answer 1

ienumerable:when we want to deal with inprocess memory, i.e without dataconnection iqueryable:when to deal with sql server, i.e with data connection ilist : operations like add object, delete object etc