Open your project’s .csproj file and add this line inside a PropertyGroup. <LangVersion>8.0</LangVersion> ... Adapting Projects to Use C# 8 and Nullable Reference Types; About the Author.

This report is a case study on upgrading a C# 7 class library to C# 8 with nullable reference types. The project used in this case study is a collection of MVVM style base classes, reflection code ...