Plane Properties 
The Plane type exposes the following members.
Name  Description  

IsValid 
Gets a value indicating whether or not this is a valid plane.
A plane is considered to be valid when all fields contain reasonable
information and the equation jibes with point and zaxis.
 
Normal 
Gets the normal of this plane. This is essentially the ZAxis of the plane.
 
Origin 
Gets or sets the origin point of this plane.
 
OriginX 
Gets or sets the X coordinate of the origin of this plane.
 
OriginY 
Gets or sets the Y coordinate of the origin of this plane.
 
OriginZ 
Gets or sets the Z coordinate of the origin of this plane.
 
Unset 
Gets a plane that contains Unset origin and axis vectors.
 
WorldXY 
plane coincident with the World XY plane.
 
WorldYZ 
plane coincident with the World YZ plane.
 
WorldZX 
plane coincident with the World ZX plane.
 
XAxis 
Gets or sets the X axis vector of this plane.
 
YAxis 
Gets or sets the Y axis vector of this plane.
 
ZAxis 
Gets or sets the Z axis vector of this plane.
