Situation: You had project A,B,C,D in solution X,Y
Project A, B, C in X Project A, C, D in Y
I need use project C in project A, but later i dont use. In bin Debug project A had C.dll.
If I compile solution X, all good ( in this solution i delete reference A -> C. ), but in solution Y I get this problem.
Solution is delete C.dll in project A bin Debug