Developers worldwide have always had difficulty searching data because of the unavailability of a specific path and the necessity to know a variety of technologies such as SQL, Web Services, and XQuery.

LINQ (Language Integrated Query), introduced in Visual Studio 2008 and designed by Anders Hejlsberg, allows you to write queries without knowing SQL or XML. For several data types, you can write LINQ queries.

C# 3.0 and the.NET Framework 3.5 introduced Language-Integrated Query (LINQ). As a result, SQL Server Syntax and SQL-related ADO.NET objects are required. Now that we've had some time to think about it, we'd like to switch to Oracle Database; therefore, you'll need to re-learn Oracle syntax and ADO.NET objects to operate with C#.

The amount of technology that must be adapted is the source of this dilemma. You must study all of the languages in this scenario. Microsoft introduces LINQ to avoid this. You may use LINQ to work with database-supplied collections and interact with a variety of other sources of data, such as an XML file, a memory-data table, and so on. Even when working with Reflections, you can use LINQ. For querying, filtering, grouping, ordering and projecting data in.NET, any data source that implements the I Enumerable interface can be used.