Code Inspection: Convert Nullable of T to 'T?' Last modified: 08 March 2021 tipYou can suppress this inspection to ignore specific issues, change its severity level to make the issues less or more noticeable, or disable it altogether.In C#, it is not necessary to use the full Nullable<T> type name because the language allows you to write T? instead. Consequently, ReSharper offers the option to replace the long type name with the shorthand.