Upgrade to .NET 9

[snickler]

Suggested new feature or improvement

Upgrade to the latest .NET 9 Release

Scenario

.NET 9 provides further performance enhancements.

Additional details

https://learn.microsoft.com/en-us/dotnet/core/whats-new/dotnet-9/overview

[similar-issues-ai[bot]]

We've found some similar issues:

• #1957 , similarity score: 82%

If any of the above are duplicates, please consider closing this issue out and adding additional context in the original issue.

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[snickler]

I can take this one on / collaborate :)