How to ignore files to GIT

If you want to ignore a file that you've committed in the past, you'll need to delete the file from your repository and then add a . gitignore rule for it. Using the --cached option with git rm means that the file will be deleted from your repository, but will remain in your working directory as an ignored file.

 

https://www.atlassian.com/git/tutorials/saving-changes/gitignore 

Please read microsoft documentation , why this file is generated and how to resolve this

https://docs.microsoft.com/en-us/archive/blogs/kirillosenkov/msbuild-unnecessary-rebuilds-because-of-generated-assemblyattributes-cs