Public Function GetEnumerator() As IEnumerator(Of T)

public IEnumerator<T> GetEnumerator()

BTreeList<int> data = new BTreeList<int>(Comparer, GetSample());
BTreeList<int> copy = (BTreeList<int>) ((ICloneable) data).Clone();
using(IEnumerator<int> e1 = data.GetEnumerator())
using(IEnumerator<int> e2 = copy.GetEnumerator())
{
    while(e1.MoveNext() && e2.MoveNext())
    {
        Assert.AreEqual(e1.Current, e2.Current);
    }
    Assert.IsFalse(e1.MoveNext() || e2.MoveNext());
}

Dim data As New BTreeList(Of Integer)(Comparer, GetSample())
Dim copy As BTreeList(Of Integer) = DirectCast((DirectCast(data, ICloneable)).Clone(), BTreeList(Of Integer))
Using e1 As IEnumerator(Of Integer) = data.GetEnumerator()
    Using e2 As IEnumerator(Of Integer) = copy.GetEnumerator()
        While e1.MoveNext() AndAlso e2.MoveNext()
            Assert.AreEqual(e1.Current, e2.Current)
        End While
        Assert.IsFalse(e1.MoveNext() OrElse e2.MoveNext())
    End Using
End Using