DropDownList1.Items.Add("item1");
DropDownList1.Items[0].Attributes.Add("title", "This is Item1!");
DropDownList1.Items.Add("item2");
DropDownList1.Items[1].Attributes.Add("title", "This is Item2!");
DropDownList1.Items.Add("item3");
DropDownList1.Items[2].Attributes.Add("title", "This is Item3!");
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