Sets Member Forces to element. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 16.0.0.0 (16.0.0.0) 
  Since:  2016 
Syntax
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Parameters
- memberForces
 -  Type:  Autodesk.Revit.DB.Structure MemberForces  
End to which member forces will be added is defined by setting [!:Autodesk::Revit::DB::Structure::MemberForces::Position] property in provided Member Forces object. 
Remarks
 If element already have member forces defined for that end, newly provided values replace current one. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |