| Name | Description |
| Add | Method that creates a new centerline. The centerline created with this method is kRegularCenterline type. |
| AddBisector | Method that creates a new bisector centerline. The centerline created with this method is kBisectorCenterline type. |
| AddByWorkFeature | Method that creates a center line that represents the work feature within the drawing view. |
| AddCenteredPattern | Method that creates a new centerline pattern. The centerline created with this method is kCenteredPatternCenterline type. |
| Name | Description |
| Application | Returns the top-level parent application object. When used the context of Inventor, an Application object is returned. When used in the context of Apprentice, an ApprenticeServer object is returned. |
| Count | Property that returns the number of items in the collection. |
| Item | Method that returns the specified Centerline object from the collection. |
| Type | Returns an ObjectTypeEnum indicating this object's type. |