Code inspection: Try cast and check for null can be replaced with a type check

This inspection reports as casts that are only used to check whether a value has a given type. In that situation, is expresses the intent more directly and avoids an unnecessary cast.

Example

                if (obj as string != null)
                {
                    Use();
                }
            

                if (obj is string)
                {
                    Use();
                }
            

Quick-fix

Replace the as cast and null check with an is type check.

01 April 2026