Isolation levels only apply to selects. There's no way to do a data modification without taking locks.

Are there any indexes on the table? Any triggers? Can you post the code...

Hello,

Thanks for your reply.

I am trying to do so, but I have the problem that within C# IMHO there is no obvious way to change the transaction isolation level of...

Hello,

Thanks for your assistance. I will read the articles you provided as they seem to be very interesting. But I still could need some help in interpreting the error log...