C# ComboBox基本使用

 1 Dictionary<string, string>test = new Dictionary<string, string>();
 2         test.Add("1", "第一行");
 3         test.Add("2", "第二行");
 4         test.Add("3", "第三行");
 5         comboBox1.DataSource = new BindingSource(test, null);
 6         comboBox1.DisplayMember = "Value";
 7         comboBox1.ValueMember = "Key";
 8 
 9 
10 string value = ((KeyValuePair<string, string>)comboBox1.SelectedItem).Value;