Code inspection: Replace with SingleOrDefault($args$)

This inspection reports a guarded conditional expression that first checks another condition and then uses Any(...) ? Single(...) : null. When the guard is true, the inner Any/Single pair can be simplified to SingleOrDefault(...).

Example

                var item = isEnabled && items.Any(x => x.IsActive)
                    ? items.Single(x => x.IsActive)
                    : null;
            

                var item = isEnabled
                    ? items.SingleOrDefault(x => x.IsActive)
                    : null;
            

Quick-fix

Replace the guarded Any(...) ? Single(...) : null pattern with SingleOrDefault(...).

29 March 2026