chore: Use string.Method(char) instead of string.Method(string) when possible

[Meir017]

enforcing the following rules https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/quality-rules/ca1865-ca1867

Microsoft Reviewers: Open in CodeFlow

[anthony-c-martin]

Thanks for improving the code!

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 7.71%. Comparing base (108d816) to head (18409b8).
Report is 617 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main   #14255       +/-   ##
===========================================
- Coverage   94.28%    7.71%   -86.57%     
===========================================
  Files        1113        7     -1106     
  Lines      100791      350   -100441     
  Branches     8734      125     -8609     
===========================================
- Hits        95028       27    -95001     
+ Misses       4595      322     -4273     
+ Partials     1168        1     -1167     

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[github-actions]

Test this change out locally with the following install scripts (Action run 9439016547)

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