Don't write out the assets flag file if CBTNuGetGeneratePackageProperties is false. The flag file is only used for property generation so there's no point in running the target if the data isn't used
Exclude traversal projects from the generated SLN file in Traversal Restore. NuGet restores packages for dirs.proj which adds unneeded overhead.
CBTNuGetGeneratePackagePropertiesisfalse. The flag file is only used for property generation so there's no point in running the target if the data isn't useddirs.projwhich adds unneeded overhead.