juniorLINQ
What is LINQ in C#?
Updated May 16, 2026
Short answer
LINQ (Language Integrated Query) is a feature in C# that allows querying collections, databases, XML, and other data sources using a consistent syntax.
Deep explanation
LINQ integrates query capabilities directly into C#, enabling strongly-typed queries over IEnumerable and IQueryable sources. It improves readability, reduces boilerplate loops, and supports both in-memory and remote data querying.
Real-world example
Filtering active users from a list in an application dashboard.
Common mistakes
- Confusing LINQ with SQL or assuming it always runs in-memory.
Follow-up questions
- What are LINQ providers?
- Is LINQ faster than loops?