Change 'List<string>' in 'CustomException.ErrorMessages' to use 'Collection<T>', 'ReadOnlyCollection<T>' or 'KeyedCollection<K,V>' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1002)

Properties should not return arrays (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1819)

Change 'Fields' to be read-only by removing the property setter (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2227)

Change 'List<string>' in 'Search.Fields' to use 'Collection<T>', 'ReadOnlyCollection<T>' or 'KeyedCollection<K,V>' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1002)

Change 'List<string>' in 'CustomException.CustomException(string,

Specify a culture or use an invariant version to avoid implicit dependency on current culture (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1311)

Specify a culture or use an invariant version to avoid implicit dependency on current culture (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1311)

Specify a culture or use an invariant version to avoid implicit dependency on current culture (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1311)

Prefer comparing 'Count' to 0 rather than using 'Any()', both for clarity and for performance (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1860)