public static float GetManhattanDistance(this Vector2 a, Vector2 b)
 {
     return(DistanceHelper.GetManhattanDistance(a.X, a.Y, b.X, b.Y));
 }
 public static float GetManhattanDistance(this PointF a, PointF b)
 {
     return(DistanceHelper.GetManhattanDistance(a.X, a.Y, b.X, b.Y));
 }