A single object element for the object that provides the value. This object must support object element syntax for default construction.
A string that is interpreted by a particular object's attributed type converter, which can generate an instance of the object. You can use this form for enumeration values, by specifying the name of the desired constant from the enumeration.
Type: System.Object The key frame's target value, which is the value of this key frame at its specified KeyTime. The default is null.