public bool Contains(RangeFloat v) => v.First >= First && v.Second <= Second;
public bool Overlaps(RangeFloat v) => Contains(v.First) || Contains(v.Second) || v.Contains(First) || v.Contains(Second);
public bool Equals(RangeFloat v)
{
return(First.Equals(v.First) && Second.Equals(v.Second));
}