public override String ToString()
{
if (null == _toString)
{
StringBuilder sb = new StringBuilder();
sb.Append("<");
for (int i = 0; i < values.Length; i++)
{
if (i > 0)
{
sb.Append(", ");
}
sb.Append(values[i]);
}
sb.Append(">");
_toString = sb.ToString();
}
return _toString;
}