juniorADO.NET
What is ADO.NET and what problem does it solve?
Updated Apr 28, 2026
Short answer
ADO.NET is a data access technology in .NET used to interact with databases in a connected or disconnected manner.
Deep explanation
ADO.NET provides a set of classes to connect, query, and manipulate data from databases like SQL Server. It supports both connected (using DataReader) and disconnected (using DataSet) architectures. It emphasizes performance, scalability, and flexibility.
Real-world example
Fetching user data from a database in a web application.
Common mistakes
- Not closing connections properly
- overusing DataSet.
Follow-up questions
- What is the difference between connected and disconnected architecture?
- Why is ADO.NET still relevant?