Documentation Framework that turns your unit tests into documentation. While there are explicit settings below, you would most likely have sensible defaults for titles, section names, and documentation files external to your unit tests.

documentation.cs

[Documentation(Section = "Math", 
                   Intro = "addition_intro.md",
                   Conclusion = "addition_conclusion.md",
                   Order = 1 )]
    public class Addition
    {
        [Fact]
        [Documentation(Title = "Adding Two Numbers", Intro = "adding_two_numbers.md", Order = 1)]
        public void Adding_two_numbers()
        {
            // unit test will be put in documentation
        }

        [Fact]
        [Documentation(Title = "Adding Two Numbers", Intro = "adding_two_numbers.md", Order = 1)]
        public void Adding_positive_and_negative_numbers()
        {
            // unit test will be put in documentation
        }
    }