|  | This document is archived and information here might be outdated. Recommended version. | 
| ArcObjects namespaces > EditorExt > ESRI.ArcGIS.EditorExt > Interfaces > IM > IMapTopology Interface > IMapTopology.AddClass Method (ArcObjects .NET 10.4 SDK) | 
Adds a feature class to this map topology. All existing topology elements will become invalid.
[Visual Basic .NET] Public Sub AddClass ( _ ByVal fclass As IFeatureClass _ )
[C#] public void AddClass ( IFeatureClass fclass );
This method has been depreciated in favor of IMapTopology.AddLayer