ASP.NET documentation is open for contributions in GitHub!
ASP.NET Core docs and now ASP.NET docs are open and available in GitHub where you can contribute to the docs and code samples directly or notify the community (which includes our teams here at Microsoft) of a doc issue.
You can also see what doc projects are under way and get involved to discuss approach, scope, and priority.
Take a look at these current projects and issues lists to discover community group efforts you might be interested in:
Build end-to-end solutions in Microsoft Azure to create Azure Functions, implement and manage web apps, develop solutions utilizing Azure storage, and more.