public override string ToString()
{
StringBuilder sb = new StringBuilder();
sb.Append(Name+':');
for (int i = 0; i < H_vertical.Count(); i++)
{
sb.Append(H_vertical[i].ToString() + ',' + H_horizantal[i].ToString() + " ");
}
sb.Remove(sb.Length - 1, 1);
return sb.ToString();
}