public void AddRange_Null ()
{
ComboBox.ObjectCollection col = new ComboBox.ObjectCollection (new ComboBox ());
try {
col.AddRange (null);
Assert.Fail ("#1");
} catch (ArgumentNullException ex) {
Assert.AreEqual (typeof (ArgumentNullException), ex.GetType (), "#2");
Assert.IsNull (ex.InnerException, "#3");
Assert.IsNotNull (ex.Message, "#4");
Assert.IsNotNull (ex.ParamName, "#5");
Assert.AreEqual ("items", ex.ParamName, "#6");
}
}