juniorADO.NET
What is SqlDataReader?
Updated Apr 28, 2026
Short answer
SqlDataReader reads data in a forward-only, read-only manner.
Deep explanation
It provides fast data retrieval with minimal memory usage. Requires open connection during operation.
Real-world example
Reading large datasets efficiently.
Common mistakes
- Not closing reader.
Follow-up questions
- Why is it fast?
- When to use DataReader?