AssemblyVersion and AssemblyFileVersion

See here
and here

• AssemblyVersion is .NET version info whilst 'AssemblyFileVersion' is Windows version number, ie., what you see when you do view the file properties of an assembly in windows explorer. AssemblyVersion defines the version other assemblies are compiled against in their manifest.
• If 'AssemblyFileVersion' attribute is not present in 'AssemblyInfo.cs' then AssemblyFileVesrion takes the same value as AssemblyVersion.