Code inspection: Subpattern that always matches is redundant

This inspection reports a nested subpattern that always matches and therefore does not add any useful condition. This usually happens when a property or positional subpattern checks a non-nullable value with a pattern such as { }.

Example

                if (obj is Settings { Enabled: { } })
                {
                    Apply();
                }
            

                if (obj is Settings)
                {
                    Apply();
                }
            

Quick-fix

The quick-fix removes the redundant subpattern.

13 April 2026