Vector2d Properties 
The Vector2d type exposes the following members.
Name  Description  

IsValid 
Gets a value indicating whether this vector is valid.
A valid vector must be formed of valid component values for x, y and z.
 
Length 
Computes the length (or magnitude, or size) of this vector.
This is an application of Pythagoras' theorem.
 
SquareLength 
Returns the square of the length of the vector.
 
Unset 
Gets the value of the vector with components set as RhinoMath.UnsetValue,RhinoMath.UnsetValue.
 
X 
Gets or sets the X (first) component of this vector.
 
Y 
Gets or sets the Y (second) component of this vector.
 
Zero 
Gets the value of the vector with components 0,0.
