C# ListBox Double click on selected item

private void Form1_Load(object sender, System.EventArgs e) { listBox1.Items.Add("Item1"); listBox1.Items.Add("Item2"); listBox1.Items.Add("Item3"); listBox1.Items.Add("Item4"); listBox1.Items.Add("Item5"); } private void button1_Click(object sender, System.EventArgs e) { String strItem; foreach(Object selecteditem in listBox1.SelectedItems) { strItem = selecteditem as String; System.Diagnostics.Debug.WriteLine(strItem); //Process(strItem); } }