The Application Creation object is used to create new instances of utility objects. 
   Namespace:   Autodesk.Revit.Creation  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
Remarks
 General purpose objects can be generated by this creation object. Creating objects via this object ensures that they will be correctly constructed and will reside in the Autodesk Revit memory space.