public virtual void TestToString()
{
StringBuilder exp = new StringBuilder();
exp.Append("[");
exp.Append(REF_A);
exp.Append(", ");
exp.Append(REF_B);
exp.Append("]");
RefList <Ref> list = ToList(REF_A, REF_B);
NUnit.Framework.Assert.AreEqual(exp.ToString(), list.ToString());
}