[C#] fix: Change bracket notation to object initializer

[singhk97]

Linked issues

closes: #minor (issue number)

Details

• Change bracket notation (C#12 feature) to object initializer since it is not supported in .NET 6.

Attestation Checklist

• [x] My code follows the style guidelines of this project

• I have checked for/fixed spelling, linting, and other errors

• I have commented my code for clarity

• I have made corresponding changes to the documentation (updating the doc strings in the code is sufficient)

• My changes generate no new warnings

• I have added tests that validates my changes, and provides sufficient test coverage. I have tested with:

  • Local testing
  • E2E testing in Teams

• New and existing unit tests pass locally with my changes