public override string ToString()
{
StringBuilder sbuilder = new StringBuilder();
sbuilder.AppendFormat("\n <SI: {0}, DOF({1}) ",
PortID,
DegreeFreedom);
foreach (var item in DatumList.Values)
{
sbuilder.AppendFormat("|({0},{1})",
item.DatumName,
item.Type.ToString());
}
sbuilder.AppendFormat(">");
sbuilder.AppendLine();
return sbuilder.ToString();
}
}