public static bool Collision(DatePeriod period1, DatePeriod period2)
{
if (period2.Start < period1.Start)
{
return period2.End >= period1.Start;
}
if (period2.End >= period1.End)
{
return period2.Start < period1.End;
}
return true;
}
public bool Collision(DatePeriod period)
{
return Collision(this, period);
}