IEnumerable Vs IQuerable

S.No		IEnumerable	IQuerable
1	namespace	Sysem.Collection	System.LINQ
2	query data	in-memory collections like List, Array etc.	out-memory (like remote database, service) collections.
3	suitable	LINQ to Object and LINQ to XML queries.	LINQ to SQL queries
4	supports	custom query.	custom query using CreateQuery and Execute methods
5	Extension methods	IEnumerable takes functional objects.	expression objects means expression tree.