Dictionary used for key value pair
var dicQuarter = new Dictionary<List<Dealer>, int >(); dicQuarter.Add("-Select-", 0); dicQuarter.Add("Quarter-I", 1); dicQuarter.Add("Quarter-II", 2); dicQuarter.Add("Quarter-III", 3); dicQuarter.Add("Quarter-IV", 4); ddlAuthorisedFullName.DataSource = dicQuarter; ddlAuthorisedFullName.DataTextField = "FULLNAME"; ...