Got rid of IDE0066, IDE0250, IDE0063 warnings

[baranyaimate]

The issue or feature being addressed

Contributes to #1290

Details on the issue fix or feature implementation

Got rid of IDE0066, IDE0250, IDE0063 warnings in the Polly project

Confirm the following

• I started this PR by branching from the head of the default branch
• I have targeted the PR to merge into the default branch
• I have included unit tests for the issue/feature
• I have successfully run a local build

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (eb63dab) 84.79% compared to head (fec589e) 84.81%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1930      +/-   ##
==========================================
+ Coverage   84.79%   84.81%   +0.01%     
==========================================
  Files         312      312              
  Lines        6893     6901       +8     
  Branches     1056     1056              
==========================================
+ Hits         5845     5853       +8     
  Misses        839      839              
  Partials      209      209              

Flag	Coverage Δ
linux	84.81% <100.00%> (+0.01%)	⬆️
macos	84.81% <100.00%> (+0.01%)	⬆️
windows	84.81% <100.00%> (+0.01%)	⬆️

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