Reduced nesting levels through block-scoped usings and the inversion of an if block.

[Lehonti]

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 (N/A)
• I have successfully run a local build

[codecov]

Codecov Report

Merging #1453 (df694c9) into main (77e91d5) will increase coverage by 0.02%.
The diff coverage is 90.42%.

@@            Coverage Diff             @@
##             main    #1453      +/-   ##
==========================================
+ Coverage   83.90%   83.92%   +0.02%     
==========================================
  Files         273      273              
  Lines        6516     6506      -10     
  Branches     1012     1012              
==========================================
- Hits         5467     5460       -7     
+ Misses        840      837       -3     
  Partials      209      209              

Flag	Coverage Δ
linux	83.92% <90.42%> (+0.02%)	⬆️
macos	83.92% <90.42%> (+0.02%)	⬆️
windows	83.92% <90.42%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
...ircuitBreaker/ConsecutiveCountCircuitController.cs	84.00% <78.94%> (+1.85%)	⬆️
.../Polly/CircuitBreaker/AdvancedCircuitController.cs	88.23% <81.81%> (-0.96%)	⬇️
src/Polly/Timeout/TimeoutEngine.cs	96.00% <95.45%> (ø)
src/Polly/CircuitBreaker/CircuitStateController.cs	93.93% <100.00%> (-0.18%)	⬇️
src/Polly/Timeout/AsyncTimeoutEngine.cs	92.59% <100.00%> (+6.38%)	⬆️

[martincostello]

Thanks.