protected void DDLFromDataBind(object sender, EventArgs e)
 {
     FromYearsDDL.DataSource     = FromYears;
     FromYearsDDL.DataValueField = "Key";
     FromYearsDDL.DataTextField  = "Key";
     FromYearsDDL.SelectedValue  = FromYears.FirstOrDefault(y => y.Value).Key;
 }
    private void InitToYears()
    {
        ToYears = new Dictionary <string, bool>();
        //get the selected FromYear Value
        int minToYear = Convert.ToInt32(FromYears.FirstOrDefault(dict => dict.Value).Key);

        //make sure ToYears is at least FromYears
        if (minToYear < Convert.ToInt32(FromYears.Min(k => k.Key)))
        {
            minToYear = Convert.ToInt32(FromYears.Min(k => k.Key));
        }
        IEnumerable <int> toRange = Enumerable.Range(minToYear, MaxYear - minToYear);

        foreach (var toYear in toRange)
        {
            ToYears.Add(toYear.ToString(), toYear == (DateTime.Now.Year + 2));
        }
    }