A table, that associates names with objects. Its purpose is to attach any kind of (user) information to existing CADability objects. Many objects of the CADability namespace provide a UserData property, by means of which you can connect any object to it. If the object is serializable, it will be serialized together with the CADability object. If it implements IClonable it will be cloned when the containing object is cloned. If it implements IShowProperty it will be displayed together with the object in the ControlCenter. If it implements IMultiObjectUserData it will be displayed as a common property when multiple objects are displayed in the ControlCenter

[SerializableAttribute]
public class UserData : ISerializable, IDictionary<string, Object>, 
	ICollection<KeyValuePair<string, Object>>, IEnumerable<KeyValuePair<string, Object>>, 
	IEnumerable

<SerializableAttribute> _
Public Class UserData _
	Implements ISerializable, IDictionary(Of String, Object),  _
	ICollection(Of KeyValuePair(Of String, Object)), IEnumerable(Of KeyValuePair(Of String, Object)),  _
	IEnumerable

[SerializableAttribute]
public ref class UserData : ISerializable, 
	IDictionary<String^, Object^>, ICollection<KeyValuePair<String^, Object^>>, 
	IEnumerable<KeyValuePair<String^, Object^>>, IEnumerable