public void TestListImplicitImplementation()
{
IList <int> list = new List1 <int>();
Assert.AreEqual(0, list[0]);
Assert.True(list.Contains(0));
Assert.AreEqual(100, list.Count);
Assert.False(list.IsReadOnly);
Assert.Null(list.GetEnumerator());
Assert.AreEqual(200, list.IndexOf(0));
Assert.True(list.Remove(0));
var a = new int[] { 1, 2 };
list.CopyTo(a, 0);
Assert.AreEqual(0, a[0]);
}