Auto complete textbox in asp.net c#

private void Form1_Load(object sender, EventArgs e)
       {
           string[] names ={  "Jhon",
               "Joseph",
               "Tim",
               "Adam",
               "Nancy"};
           txtAutoComplete.AutoCompleteMode = AutoCompleteMode.Suggest;
           txtAutoComplete.AutoCompleteSource=AutoCompleteSource.CustomSource;
           AutoCompleteStringCollection lstSource = new AutoCompleteStringCollection();
           lstSource.AddRange(names);
           txtAutoComplete.AutoCompleteCustomSource = lstSource;
       }