A ruled face of a 3d solid. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
Remarks
 Ruled faces are defined by ruled surfaces bounded by edge loops. The surfaces provide natural UV parameterization to the faces. 
 Examples
private void GetRuledFaceInfo(Face face)
{
    RuledFace ruledFace = face as RuledFace;
    if (null != ruledFace)
    {
        Curve curve = ruledFace.get_Curve(0);
        XYZ point = ruledFace.get_Point(0);
    }
} Private Sub GetRuledFaceInfo(face As Face)
    Dim ruledFace As RuledFace = TryCast(face, RuledFace)
    If ruledFace IsNot Nothing Then
        Dim curve As Curve = ruledFace.Curve(0)
        Dim point As XYZ = ruledFace.Point(0)
    End If
End Sub Inheritance Hierarchy
  System Object  
Autodesk.Revit.DB APIObject
Autodesk.Revit.DB GeometryObject
Autodesk.Revit.DB Face
Autodesk.Revit.DB RuledFace
 
 Autodesk.Revit.DB APIObject
Autodesk.Revit.DB GeometryObject
Autodesk.Revit.DB Face
Autodesk.Revit.DB RuledFace