public void AddNearest()
            {
                ClassifiedPoint minPoint = Distance.First().Key;
                double          minDist  = Distance.First().Value;

                foreach (var item in Distance)
                {
                    if (item.Value < minDist)
                    {
                        minPoint = item.Key;
                        minDist  = item.Value;
                    }
                }

                Add(minPoint);
            }
            public void Add(ClassifiedPoint point)
            {
                Points.Add(point);
                point.Group = this;
                Distance.Remove(point);

                foreach (var itm in point.Distance)
                {
                    if (itm.Key.Group == null && !Points.Contains(itm.Key))
                    {
                        double pointDist;

                        if (!Distance.TryGetValue(itm.Key, out pointDist) || pointDist > itm.Value)
                        {
                            Distance[itm.Key] = itm.Value; // le point le plus proche du goupe est le point le plus proche parmis toutes les distances des points du groupe aux autres points
                        }
                    }
                }
            }
 public Distance(ClassifiedPoint p1, ClassifiedPoint p2, int d)
 {
     Point1        = p1;
     Point2        = p2;
     PointDistance = d;
 }