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.