Code inspection: Possible 'System.ArgumentOutOfRangeException'. Index must be a non-negative integer.

This inspection reports a constant negative index in index-from-end or range syntax. Negative index values are invalid and can cause runtime exceptions.

Example

            var values = new[] { 10, 20, 30 };
            var item = values[^-1];
        

The operand of ^ must not be negative.

How to fix it

There is no dedicated quick-fix for this inspection. Use a non-negative index instead.

            var values = new[] { 10, 20, 30 };
            var item = values[^1];
        

01 April 2026