Version Numbering Changes in Visual Basic .NETSee Also
App Object Changes in Visual Basic .NET | Attributes
In Visual Basic 6.0, setting the Major, Minor, and Revision properties of the App object controlled the version number for an application. For example, setting Major to 1, Minor to 2, and Revision to 3 resulted in a version number of 1.2.0.3.

In Visual Basic .NET, the version number properties are replaced by the AssemblyVersion attribute, which has four parts: Major, Minor, Revision, and Build. For the above example, the resulting version number would be 1.2.3.x, where x is a build number that is incremented each time the assembly is built.
I have

Code:
<Assembly: AssemblyVersion("1.0.*")>
but the "x" part of it is not upgrading with each build.