Sqlclient - connection timeout or command timeout

Question

I get the following error when starting a request.

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System.Data.SqlClient.SqlException: Timed out.
The wait period expires before the operation is completed or the server is not responding. in System.Data.SqlClient.SqlConnection.OnError (SqlException exception exception, logical connection breaks)

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Is this a connection timeout or a command timeout?

TIA

Answer 1

It looks like a team timeout. If you have a connection timeout, you will see from the stack trace that he selected from the SqlConnection.Open call. Any other timeout will be a command timeout.

Answer 2

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Answer 3

How long does the request take when starting from SSMS?

If you are fast, then the problem can be a dead end.

Do you use any transactions? Do you share the database with other applications / users?

More information would be very helpful.