C#

System.Diagnostics.Process.Start("http://www.google.com");

System.Diagnostics.Process.Start("
http://www.google.be/search?q=how+would+I+add+a+button+to+a+windows+form+that+opens+the+main+browser");

System.Diagnostics.Process.Start("http://lmgtfy.com/?q=how+would+I+add+a+button+to+a+windows+form+that+opens+the+main+browser");

object[] arr = new object[100];

foreach(ListViewItem item in listView1.SelectedItems) {
    object selObj = arr[item.Index];
}

List < blabla > array

List<String> str = new List<String>();
str.Add("Hello");
str.Add("World");

MessageBox.Show(str[0] + " " + str[1]);