Code inspection: Convert local variable or field into constant (non-private accessibility)

This inspection reports public fields that always have the same compile-time value and can be turned into a const.

It is especially useful for fields, because global analysis can verify that the field is never written to and can safely update usages.

Example

                public class Settings
                {
                    public static readonly int DefaultPort = 8080;
                }
                public class Client
                {
                    public int GetPort() => Settings.DefaultPort;
                }
            

                public class Settings
                {
                    public const int DefaultPort = 8080;
                }
                public class Client
                {
                    public int GetPort() => Settings.DefaultPort;
                }
            

Quick-fix

The quick-fix converts the field to const. When required, the quick-fix also updates references so they use the constant correctly, for example replacing instance-qualified access with type-qualified access.

27 March 2026