using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;

namespace ConsoleApplication19
{
    [Serializable]
    [XmlInclude(typeof(ListOfFigures<Geometry>))]
    public abstract class Geometry : IGeometry
    {
        [XmlAttribute]
        public double diameter
        {
            get;
            private set;
        }

        [XmlAttribute]
        public double square
        {
            get;
            private set;
        }

        public abstract int CompareTo(object obj);

        public abstract string toString();

        public Geometry() { }
    }
}