Suggested category: Performance
Suggested default severity: Suggestion
Fix is breaking or non-breaking: Non-breaking

Cause

This rule locates calls to Contains(String) when the string consists of a single char, and suggests using Contains(char) instead

Rule description

When Contains(String) is used with a single char, the call can be safely substituted with Contains(char).

Additional context

#24068
dotnet/coreclr#15740
#36310