Exclamation mark problem on dll?

Question

I've added a DLL to my project, written with visual studio 2005.
After I did so, an exclamation mark appears nearby the added DLL.

I want to not having this exclamation mark because I'm assume its reflect about a problem.

A friend of me added this DLL to his project on this computer and everything worked well, so I assume I didn't added it well nor there is a problem in my visual studio/computer.

Any ideas how to handle it?

Answer 1

I had the same problem when Target framework of destination project and the version of references was different. After I've changed it Project properties, it worked.

Answer 2

This usually means that VS can't find the assembly. Make sure it's in a location that is accessible to you, and compare this with your friend's. E.g., is it on a co-worker's machine that may be turned off at certain times? Is it on a network drive?

I'd suggest making a local copy of the file and seeing if the problem is solved.

Question is a possible duplicate of this one.