How to check if a DateTime range is within another 3 month DateTime range

Question

Hi I have a Start Date and End Date per record in a db.

I need to check to see where the time period falls in a 2 year period broken into two lots of quarters then d

Answer 1

    private void Form1_Load(object sender, EventArgs e)
    {
        DateTime[,] ranges = new DateTime[3,2];
        //Range 1 - Jan to March
        ranges[0, 0] = new DateTime(2010, 1, 1);
        ranges[0, 1] = new DateTime(2010, 3, 1);
        //Range 2 - April to July
        ranges[1, 0] = new DateTime(2010, 4, 1);
        ranges[1, 1] = new DateTime(2010, 7, 1);
        //Range 3 - March to June
        ranges[2, 0] = new DateTime(2010, 3, 1);
        ranges[2, 1] = new DateTime(2010, 6, 1);

        DateTime checkDate = new DateTime(2010, 4, 1);
        string validRanges = string.Empty;

        for (int i = 0; i < ranges.GetLength(0); i++)
        {
            if (DateWithin(ranges[i,0], ranges[i,1], checkDate))
            {
                validRanges += i.ToString() + " ";
            }
        }
        MessageBox.Show(validRanges);
    }

    private bool DateWithin(DateTime dateStart, DateTime dateEnd, DateTime checkDate)
    {
        if (checkDate.CompareTo(dateStart) < 0 || checkDate.CompareTo(dateEnd) > 0)
        {
            return false;
        }
        return true;
    }