IQueriable Interface

The IQueriable interface is used to execute queries against a data source, where the type of ata returned from the source is not known at design time.

IQueriable interface inherits from the IEnemurable interface, and allows the objects to be queried based on the underlying data source, hence they are more efficient when the types are to be queried/filtered further.

Namespace:  System.Linq 

IQueriable

The IQueriable interface is similar to the IQueriable interface except that it is used to execute queries against a data source, where the type of data returned from the source is known. The indicates the type of objects that will be returned from the source

Namespace:  System.Linq