What do LINQ operators return?

What do LINQ operators return?

Set operators in LINQ include Distinct (to remove duplicate values), Except (returns the difference of two sequences), Intersect (returns the intersection of two sequences), and Union (returns the unique elements of two sequences).

What type of LINQ query would produce an output of type anonymous?

The select statement returns an anonymous type that captures only two members of the original Customer object. The data source type argument is always the type of the range variable in the query. Because the select statement produces an anonymous type, the query variable must be implicitly typed using var .

What are LINQ providers?

A linq provider is software that implements the IQueryProvider and IQueryable interfaces for a particular data store. In other words, it allows you to write Linq queries against that data store. For example, the Linq to XML provider allows you to write Linq queries on XML documents.

What kinds of objects can you query with LINQ?

You can use LINQ to query any enumerable collection, such as a List, Array, or Dictionary. The collection can be user defined or it can be returned by a . NETWORK API.

How to return a list of specific types in LINQ?

By default, LINQ queries return a list of objects as an anonymous type. You can also specify that a query return a list of a specific type using the Select clause. The following example shows how to create a new application that queries a SQL Server database and projects the results as a specific named type.

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How to return a query result as a specific type?

Language-Integrated Query (LINQ) makes it easy to access database information and execute queries. By default, LINQ queries return a list of objects as an anonymous type. You can also specify that a query return a list of a specific type using the Select clause.

How to return a list of specific types?

You can also specify that a query return a list of a specific type using the Select clause. The following example shows how to create a new application that queries a SQL Server database and projects the results as a specific named type. For more information, see Anonymous Types and the Select Clause.

How to query a database using LINQ Visual Basic?

The Object Relational Designer (O/R Designer) opens for the northwind.dbml file. In Server Explorer / Database Explorer, expand the Northwind database connection. Expand the Tables folder. If you closed O/R Designer, you can reopen it by double-clicking the northwind.dbml file you added earlier.