private void Common (OrderedDictionary od)
{
Assert.IsNotNull (od.GetEnumerator (), "GetEnumerator");
Assert.AreEqual (0, od.Count, "Count-0");
Assert.IsFalse (od.IsReadOnly, "IsReadOnly");
od.Add ("a", "1");
Assert.AreEqual (1, od.Count, "Count-1");
od["a"] = "11";
Assert.AreEqual ("11", od["a"], "this[string]");
od[0] = "111";
Assert.AreEqual ("111", od[0], "this[int]");
DictionaryEntry[] array = new DictionaryEntry[2];
od.CopyTo (array, 1);
Assert.AreEqual ("111", ((DictionaryEntry)array[1]).Value, "CopyTo");
Assert.AreEqual (1, od.Keys.Count, "Keys");
Assert.AreEqual (1, od.Values.Count, "Values");
Assert.IsTrue (od.Contains ("a"), "Contains(a)");
Assert.IsFalse (od.Contains ("111"), "Contains(111)");
od.Insert (0, "b", "2");
Assert.AreEqual (2, od.Count, "Count-2");
od.Add ("c", "3");
Assert.AreEqual (3, od.Count, "Count-3");
OrderedDictionary ro = od.AsReadOnly ();
od.RemoveAt (2);
Assert.AreEqual (2, od.Count, "Count-4");
Assert.IsFalse (od.Contains ("c"), "Contains(c)");
od.Remove ("b");
Assert.AreEqual (1, od.Count, "Count-5");
Assert.IsFalse (od.Contains ("b"), "Contains(b)");
od.Clear ();
Assert.AreEqual (0, od.Count, "Count-6");
Assert.IsTrue (ro.IsReadOnly, "IsReadOnly-2");
// it's a read-only reference
Assert.AreEqual (0, od.Count, "Count-7");
}