Each object has associated properties and methods. Properties describe aspects of the individual object, while methods are actions that can be performed on the individual object. Once an object is created, you can query and edit the object through its properties and methods.
For example, a Circle object has a Center property. This property represents the point in the world coordinate system (WCS) at the center of that circle. To change the center of the circle, simply set the Center property to a new point. The Circle object also has a method called GetOffsetCurves. This method creates a new object at a specified offset distance from the existing circle.
To see a list of all properties and methods for the Circle object, refer to the Circle object reference topic or use the Object Browser in Microsoft® Visual Studio®.