Issue / .NET 9 Update

[SeferMirza]

Upgrade .Net, C# and other versions.

Tasks

• Learn .NET 8 Epic / .NET 9 learn-dotnet#36
• Update .Net and Language version.
  • version in .csproj
  • version in workflows
  • version in sample
  • version in docker
• Migration plan
  • Use status code selector in exception handler
  • Migrate to property in regex source generation
  • If Base64 encoded information is carried in the url, use
    Base64Url.
  • If need to take parameters with an Array using params
    and then convert to IEnumerable type, use IEnumerable instead of
    Array.
  • Use the new linQ extensions(CountBy, AggregateBy,
    Index<TSource>(IEnumerable<TSource>)).
  • Use new TimeSpan.From* overloads
    • FromDays
    • FromHours
    • FromMinutes
    • FromSeconds
    • FromMilliseconds
    • FromMicroseconds
  • Use Keyed Services in Middlewares.
• Upgrade Issues
  • Antlr3.runtime access denied issue on windows, unable to access issue on
    linux
• Migrations page on website

Additional Tasks

• Remove the whole base namespace (not just first part) from open api types