.net SqlConnection closes by itself

Question

I have a static class handling my DB access. When I open an SqlConnection and access it multithreadedly - it closes by itself after 1-2 queries. Nowhere in my code I close it - any thoughts???

Thank you Waldo

Answer 1

When I open an SqlConnection and access it multithreadedly

Then don't access it "multithreadedly" - it's not thread-safe. Instead, open/close it on each thread, preferably with a using statement.

MSDN indicates that instance methods of this class are not thread-safe .