Problem with assembly reference not updating

I have a solution A which references an assembly in solution B. I added the reference to the project in A by right clicking on the project > add reference, and finding the dll in the bin/Debug folder of the project in solution B in the Browse tab. However, the reference to assembly B is not being updated in solution when I update the code in project B, even though I am making sure that I recompile the code in project B and then in project A. This means I am unable to debug A properly because the source code does not match the executable (I've checked and the location of the file the bre ...