ComboBox Vs ListBox

S.No		ComboBox	ListBox
1	Select	One Data	Multiple Data.
2	Facility	Drop Down Facility.	Drop up and Drop Down Facility
3	check Box	can't Use CheckBox.	Can use Check Box.

LINQToSQL Vs Entity Framework

S.No		LINQTOSQL	Entity Framwork
1	Used	rapid application development	enterprise application development.
2	Support	MS SQL Server database.	supports all existing ADO.NET data providers.
3	Relationship	One to One.	Many to Many.

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.