How do I document a c# dll

Question

How do I write a class so that property and method descriptions are visible to people referencing the dll in other projects?

    [Description("My age in years attribute")]
    public int Age
    {
        get { return 0; }
        set { }
    }

doesn't work, neither does

    /// <summary>
    /// My age in years attribute
    /// </summary>
    public int Age
    {
        get { return 0; }
        set { }
    }

Answer 1

In Visual Studio:

Project -> Properties -> Build -> Check "XML Documentation File".

For further details, see XML Comments Let You Build Documentation Directly From Your Visual Studio .NET Source Files.