LINQ to SQL
LINQ to SQL is an object-relational mapping (ORM) framework developed by Microsoft for the .NET Framework, specifically designed to work with SQL Server databases. It allows developers to query and manipulate SQL Server data using Language Integrated Query (LINQ) syntax directly in C# or Visual Basic .NET, translating LINQ queries into SQL commands at runtime. The framework provides a data context class to manage database connections and entity classes that map to database tables, enabling a more object-oriented approach to database interactions.
Developers should learn LINQ to SQL when building .NET applications that require efficient data access to SQL Server databases, as it simplifies database operations by eliminating much of the boilerplate SQL code. It is particularly useful for rapid application development in scenarios like small to medium-sized projects, prototypes, or when leveraging existing SQL Server infrastructure without complex mapping needs. However, for larger enterprise applications or cross-database compatibility, alternatives like Entity Framework are often preferred due to broader features and support.