HtmlTags (edit)

• Install-Package HtmlTags
• Install-Package HtmlTags.AspNetCore
• Install-Package xUnit
• Install-Package Shouldly

https://github.com/HtmlTags/htmltags

Samples

var tag = new HtmlTag("span");
tag.Text("Hello & Goodbye");
tag.AddClass("important");
tag.Attr("title", "Greeting");

Unit tests

• xUnit (xUnit.net is a developer testing framework, built to support Test Driven Development, with a design goal of extreme simplicity and alignment with framework features.)
• Shouldly (Shouldly - Assertion framework for .NET. The way asserting *Should* be)

https://github.com/HtmlTags/htmltags/blob/master/test/HtmlTags.Testing/HtmlTagTester.cs