Tree Structured Enumerations

using System;

namespace TreeStructuredEnumerations
{
    [AttributeUsage(AttributeTargets.Enum)]
    public class StructuredAttribute : Attribute
    {
        public int span;

        public int Span
        {
            get { return span; }
            set { span = value; }
        }

        public StructuredAttribute(int span)
        {
            this.span = span;
        }
    }

}