解决arcscene 不能显示问题 The 3D Analyst extension has not been enabled

The 3D Analyst extension has not been enabled

解决办法：

ESRI.ArcGIS.esriSystem.IExtensionManagerAdmin iExtensionManagerAdmin = new ESRI.ArcGIS.esriSystem.ExtensionManagerClass();
UID iUid3D = new UIDClass();
iUid3D.Value = "{94305472-592E-11D4-80EE-00C04FA0ADF8}";
object o = new object();
iExtensionManagerAdmin.AddExtension(iUid3D, ref o);
IExtensionConfig iExtensionConfig = (IExtensionConfig)(iExtensionManagerAdmin as IExtensionManager).FindExtension(iUid3D);
iExtensionConfig.State = esriExtensionState.esriESEnabled;