PR Summary

Reference #5610

• Merges partial BasicHtmlWebResponseObject and ContentHelper classes
• Sorts the using statements for BasicHtmlWebResponseObject and ContentHelper
• Sorts class elements according to StyleCop guidance https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1201.md
• Sorts within the same elements by access type according to StyleCop guidance https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1202.md
• Sorts elements of the same type and access alphabetically.
• New regions were created where it makes sense
• Formatting and comments of code blocks was purposefully maintained. These will be handled in a separate cleanup action.
• No logic was modified

PR Checklist

Note: Please mark anything not applicable to this PR NA.

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• NA User facing Documentation needed
  • NA Issue filed - Issue link:
• Change is not breaking
• NA Make sure you've added a new test if existing tests do not effectively test the code changed
  • Add [feature] if the change is significant or affectes feature tests
• This PR is ready to merge and is not Work in Progress.
  • If the PR is work in progress, please add the prefix WIP: to the beginning of the title and remove the prefix when the PR is ready.