AcornPublishing_essential-csharp-7e/EssentialCSharp-8.0/src/Chapter07/Listing07.08.PreventingDerivationWithSealedClasses.cs
namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter07.Listing07_08
{
    public sealed class CommandLineParser
    {
        // ...
    }
    // ERROR:  Sealed classes cannot be derived from
    public sealed class DerivedCommandLineParser
    //: CommandLineParser //uncomment this line and it will not compile
    {
        // ...
    }
}
