| Name | Description |
| Add | Method that creates a new DesignProject. The newly created DesignProject is returned. |
| AddExisting | Method that adds an existing project file to the list of project files. This is equivalent of browsing to a specific ipj file on disk and choosing it in the Projects editor dialog. If the design project is already in the collection, the corresponding DesignProject object is returned. |
| 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 | Returns the specified DesignProject object from the collection. |
| ItemByName | Returns the specified DesignProject object from the collection. |
| Type | Returns an ObjectTypeEnum indicating this object's type. |