Hi Ricardo Cadete,
Thank you for reaching out to Microsoft Q & A forum.
We acknowledge that the warnings regarding the nullable properties (Title and ChildContent) and the missing readme file are minor issues. These warnings do not hinder the successful creation of the NuGet package (FirstClassLibrary.1.0.0.nupkg). Instead, they serve as informative suggestions for improving the quality and completeness of the package.
The dotnet pack
command efficiently packages your library, ensuring it can be distributed and utilized by other developers. While addressing these warnings is beneficial for adhering to best practices and enhancing clarity, they do not affect the functionality or availability of the package.
We appreciate your attention to this matter. Recognizing the importance of maintaining high package quality, we will update the command and package contents in future releases to provide a more polished and informative package for users.
Please feel free to contact us if you have any additional questions.
If you have found the answer provided to be helpful, please click on the "Accept answer/Upvote" button so that it is useful for other members in the Microsoft Q&A community.
Thank you.