Backfill assertions for .xproj and .csproj
Backfill assertions for .xproj and .csproj

[#133932443]

Signed-off-by: James Wen <3b2f4c88287a5fcd7db73a67dd1ab82807db04ee@columbia.edu>

degrim/asp.net5-buildpack,opiethehokie/asp.net5-buildpack,degrim/dotnet-core-buildpack,opiethehokie/asp.net5-buildpack,degrim/dotnet-core-buildpack,degrim/dotnet-core-buildpack,degrim/dotnet-core-buildpack,degrim/dotnet-core-buildpack,opiethehokie/asp.net5-buildpack,cloudfoundry-community/asp.net5-buildpack,opiethehokie/asp.net5-buildpack