How to go about tracing down the problem with
Warning 1 Found conflicts between different versions of the same dependent
assembly. XyzApp

I could not found another instance of XyzApp in the registry  not another
copy of XyzApp.exe other than the project directory's  obj\debug and
bin\debug

 I then deleted the contents of bin and obj before rebuilt, I  found the two
identical copies again under those directory. the VS still complain on
rebuilt on the version.