namespace WinForms
{
	public partial class Form1 : Form
	{
		List<string> list = new List<string>();
		public Form1()
		{
			list = new List<string>();
			list.AddRange(new string[] { "хлеб", "молоко", "колбаса" });
			InitializeComponent();
			dropDownList.LoadValues(new List<string>() { "сок", "яблоко", "лук" });
		}
		private void buttonAdd_Click(object sender, EventArgs e)
		{
			dropDownList.LoadValues(list);
		}

		private void buttonInfo_Click(object sender, EventArgs e)
		{
			labelInfo.Text = dropDownList.SelectedValue;
		}

		private void buttonClear_Click(object sender, EventArgs e)
		{
			dropDownList.Clear();
		}
	}
}