ground

Ground.cs

using System.Collections.Generic;

namespace Andrey
{
    public enum Terrain
    {
        Forest,
        MountainForest,
        Marsh,
        Desert,
        Arable,
        Pasture,
        Unused
    }

    public enum Relief
    {
        Mountains,
        Hills,
        Plains
    }

    public class Ground
    {
        public Dictionary<Relief, double> ReliefByPercent { get; set; }
        public Dictionary<Terrain, double> TerrainByPercent { get; set; }
        public int VolumeDrinkingWater { get; set; }
        public int Fertility { get; set; }

        public Ground (int volWater, int fertility)
        {
            this.VolumeDrinkingWater = volWater;
            this.Fertility = fertility;
            this.ReliefByPercent = new Dictionary<Relief, double>();
            this.TerrainByPercent = new Dictionary<Terrain, double>();
        }
    }


    class Program
    {
        static void Main (string[] args)
        {
            Ground ground = new Ground(1, 1);

            // SET
            ground.ReliefByPercent.Add(Relief.Plains, .50);
            ground.ReliefByPercent.Add(Relief.Mountains, .50);

            ground.TerrainByPercent.Add(Terrain.Arable, .33);
            ground.TerrainByPercent.Add(Terrain.Marsh, .33);
            ground.TerrainByPercent.Add(Terrain.Forest, .33);

            // GET
            double plainsPercent = ground.ReliefByPercent[Relief.Plains];
            double arablePercent = ground.TerrainByPercent[Terrain.Arable];

            // ITERATE
            foreach (KeyValuePair<Terrain, double> keyValue in ground.TerrainByPercent)
            {
                double percentage = keyValue.Value;

                if (keyValue.Key == Terrain.Arable)
                {
                    // ...
                }
                else if (keyValue.Key == Terrain.Pasture)
                {
                    // ...
                }
            }
        }
    }
}