public void Manipulations () { CommaDelimitedStringCollection c = new CommaDelimitedStringCollection (); c.Add ("1"); Assert.AreEqual ("1", c.ToString(), "A1"); c.Add ("2"); c.Add ("3"); Assert.AreEqual ("1,2,3", c.ToString(), "A2"); c.Remove ("2"); Assert.AreEqual ("1,3", c.ToString(), "A3"); c.Insert (1, "2"); Assert.AreEqual ("1,2,3", c.ToString(), "A4"); c.Clear (); Assert.AreEqual (null, c.ToString(), "A5"); string[] foo = new string[3]; foo[0] = "1"; foo[1] = "2"; foo[2] = "3"; c.AddRange (foo); Assert.AreEqual ("1,2,3", c.ToString(), "A6"); }