MariusVolkhart Nopen.NET by: MariusVolkhart .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. 31,972 total downloads last updated 2/13/2020 Latest version: 1.0.1 analyzer roslyn-analyzer code-quality sealed class classes A Roslyn analyzer which requires that classes be sealed, abstract or attributed with [Open].