I'm using .Net OPC Client Controls in a C# application in Visual Studio 2010.
When I use .Net Framework 3.5 for my application, everything works well but if I change the application's .Net Framework to .Net 4.0, Simatic Net OpcDaConnectorwon't work.

As I read in the Simatic Net documents, it works with .Net Framework 3.5 or higher so where is the problem?

My Simatic Net is version 8.0 on Windows 7.

Thanks,

Hello,

really not enough infos, what VS version, language, what OS? What exactly error you have, when it appears?

I have used VS 2010 and C#

when I use framework 3.5 aplication It work well, but When I use framework 4 It dosent run , I and It gıve me an error.

I need help.