Blog - Date Range

DateRange.cs

public struct DateRange
{
	private readonly DateTime _start;
	private readonly DateTime _end;

	public DateRange(DateTime start, DateTime end)
		: this()
	{
		if (start > end)
		{
			throw new ArgumentException("Start date time cannot be after end date time");
		}
		_start = start;
		_end = end;
	}

	public DateTime Start
	{
		get { return _start.Date; }
	}

	public DateTime End
	{
		get { return _end.Date; }
	}

	public static DateRange FromDays(DateTime start, int days)
	{
		if (days < 0)
		{
			return new DateRange(start.AddDays(days), start);
		}
		return new DateRange(start, start.AddDays(days));
	}

	public bool InRange(DateTime dateTime)
	{
		var date = dateTime.Date;
		return date.Date >= Start.Date && date <= End;
	}

	public static bool operator ==(DateRange range1, DateRange range2)
	{
		return range1.Start == range2.Start && range1.End == range2.End;
	}

	public static bool operator !=(DateRange range1, DateRange range2)
	{
		return !(range1 == range2);
	}

	public bool Equals(DateRange other)
	{
		return _start.Date.Equals(other._start.Date) && _end.Date.Equals(other._end.Date);
	}

	public override bool Equals(object obj)
	{
		if (ReferenceEquals(null, obj)) return false;
		return obj is DateRange && Equals((DateRange)obj);
	}

	public override int GetHashCode()
	{
		unchecked
		{
			return (_start.Date.GetHashCode() * 397) ^ _end.Date.GetHashCode();
		}
	}
}