Use an overload of 'StartsWith' that has a StringComparison parameter (https://github.com/meziantou/Meziantou.Analyzer/blob/main/docs/Rules/MA0074.md)

The behavior of 'string.StartsWith(string)' could vary based on the current user's locale settings. Replace this call in 'Cutout.Tests.SharedTests.Case1()' with a call to 'string.StartsWith(string, System.StringComparison)'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1310)

Add the default parameter value defined in the overridden method. (https://rules.sonarsource.com/csharp/RSPEC-1006)

Method overrides should not change default values (original: null; current: <no default value>) (https://github.com/meziantou/Meziantou.Analyzer/blob/main/docs/Rules/MA0061.md)

Refactor this method to reduce its Cognitive Complexity from 20 to the 15 allowed. (https://rules.sonarsource.com/csharp/RSPEC-3776)

Refactor this method to reduce its Cognitive Complexity from 18 to the 15 allowed. (https://rules.sonarsource.com/csharp/RSPEC-3776)