I was trying to upgrade a client's application to newer version, i copy the new asp.net 2.0 application folder to overwrite existing one, then it Cassini failed to load it, the icon appear in grey colour. but if i create a new one in 64bit it can be load. Or if I overwrite the program folder with the old version, it works.
at the end, what i did is to only copy the new DLL files in the bin folder, in this way it works.
But does anyone know why? Thanks.