The .dll file can't be loaded

Hi there

I just download the trial version and copy the dll file to my website Bin folder, then when I open the browser, the error screen displayed, please refer to the attachment.

It looks like the dll file can’t be registered successfully, then there is nothing I can do next.

Any one helps?

Thank you.

Fixed by myself.

DHTMLX.dll is built for .NET 4.0, so it can’t be attached to the project with a target framework of a lower version.
We could provide assembly for .NET 3.5 if needed