Описание тега asqueryable

AsQueryable Converts IEnumerable to IQueryable.

IQueryable is recommended for querying objects at remote source (like from database).

AsQueryable is used when expression tree is to be constructed to query the remote object. So if there are multiple querying constructs, Query execution after AsQueryable, is done remotely, and final result set is returned. If AsQueryable is not used, then all the subsequent queries will be executed one by one (as in pipeline). There will be multiple round-trip between remote source and application.