Upgrade to Dotnet 8TLS

[msalemcode]

Description

This PR updates the SaaS Accelerator project to use .NET 8 LTS. This upgrade ensures that the project benefits from the latest features, performance improvements, and security updates provided by .NET 8 LTS.

Changes Made

1. Project File Updates:

   • Updated the target framework in the project files to net8.0.

2. Package Updates:

   • Updated NuGet packages to versions compatible with .NET 8 LTS.

3. Code Adjustments:

   • Made necessary code changes to ensure compatibility with .NET 8 LTS.
   • Refactored deprecated APIs and replaced them with their .NET 8 LTS equivalents.

4. Configuration Updates:

   • Updated configuration files, such as appsettings.json and appsettings.test.json, to align with .NET 8 LTS best practices.

Impact

• Performance Improvements: Leveraging the performance enhancements in .NET 8 LTS.
• Security Enhancements: Utilizing the latest security features and updates in .NET 8 LTS.
• Long-Term Support: Ensuring the project is on a supported version of .NET for the foreseeable future.

Testing

• Unit Tests: All existing unit tests have been run and updated where necessary to ensure compatibility with .NET 8 LTS.
• Integration Tests: Conducted integration tests to verify that all components of the SaaS Accelerator work seamlessly with .NET 8 LTS.
• Manual Testing: Performed manual testing of critical paths to ensure no regressions or issues were introduced.

Conclusion

This PR upgrades the SaaS Accelerator to .NET 8 LTS, bringing in the latest improvements and ensuring long-term support. The update includes necessary code adjustments, package updates, and configuration changes to maintain compatibility and leverage the benefits of .NET 8 LTS.

[santhoshb-msft]

added comments

[fthorntonai]

• [Approved] Unit Tests: All existing unit tests have been run and updated where necessary to ensure compatibility with .NET 8 LTS.
• [Approved ] Integration Tests: Conducted integration tests to verify that all components of the SaaS Accelerator work seamlessly with .NET 8 LTS.
• [Approved] Manual Testing: Performed manual testing of critical paths to ensure no regressions or issues were introduced.

[v-ade]

Everything looks good. Reviewed and okay.

[fthorntonai]

• [Approved] Unit Tests: All existing unit tests have been run and updated where necessary to ensure compatibility with .NET 8 LTS.
• [Approved ] Integration Tests: Conducted integration tests to verify that all components of the SaaS Accelerator work seamlessly with .NET 8 LTS.
• [Approved] Manual Testing: Performed manual testing of critical paths to ensure no regressions or issues were introduced.
• [WIP] E2E Manual Testing: Performed E2E testing of
  git fetch origin pull/749/head:8ltsupgrade
  1. deploy PR to a new instance
  2. update an offer tech config to the details of the above instance
  3. Run an e2e customer purchase exp ,
  - [ Verified ] pending
  - [ Verified* ] activate
  - [ Verified ] customer change plan from portal - webhook testing
  - update admin portal setting "AcceptSubscriptioUpdates" to true
  - and try the change plan.
  - [ WIP ] meter
  -
  -
  - [ WIP ] scheduled meter
  -
  -
  - [ Verified ] unsubscribe

• action works but i either received an initial error or request screenshot
  ------- install warning --------
  The Entity Framework tools version '8.0.0' is older than that of the runtime '8.0.6'. Update the tools for the latest features and bug fixes. See https://aka.ms/AAc1fbw for more information.

[fthorntonai]

Run an e2e customer purchase exp

• [ Verified ] pending
• [ Verified ] activate
• [ Verified ] customer change plan from portal - webhook testing
  • update admin portal setting "AcceptSubscriptioUpdates" to true
  • and try the change plan.
• [ Accepted ] create metered billing plan
• [ Accepted ] scheduled meter billing
• [ Verified ] unsubscribe from offer

[santhoshb-msft]

Tested By Adedayo and Fredrick and Myself. Approving this.