Returns the profile (not including generated fillets) that defines the shape of the Fabric Sheet bending. 
   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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Return Value
The profile that defines the shape of the fabric sheet bending for bent fabric sheet, for flat fabric sheet a null reference ( Nothing in Visual Basic) will be returned.Remarks
 The returned profile defines the center-curve of a wire. Note that bent Fabric Sheets can have planar geometry, but flat Fabric Sheets are always planar. 
 Examples
#region Autodesk.Revit.DB.Structure.FabricSheet.SetBendProfile(Autodesk.Revit.DB.CurveLoop)
private void ModifyBentFabricSheet(Document document, FabricSheet bentFabricSheet)
{
    CurveLoop newBendingProfile = CurveLoop.CreateViaOffset(bentFabricSheet.GetBendProfile(), 0.5, new XYZ(0, 0, -1));
    bentFabricSheet.SetBendProfile(newBendingProfile);
    // Give the user some information
    TaskDialog.Show("Revit", string.Format("Bent Fabric Sheet ID='{0}' modified successfully.", bentFabricSheet.Id.IntegerValue));
}
#endregion '#Region "Autodesk.Revit.DB.Structure.FabricSheet.SetBendProfile(Autodesk.Revit.DB.CurveLoop)"
Private Sub ModifyBentFabricSheet(document As Document, bentFabricSheet As FabricSheet)
   Dim newBendingProfile As CurveLoop = CurveLoop.CreateViaOffset(bentFabricSheet.GetBendProfile(), 0.5, New XYZ(0, 0, -1))
   bentFabricSheet.SetBendProfile(newBendingProfile)
   ' Give the user some information
   TaskDialog.Show("Revit", String.Format("Bent Fabric Sheet ID='{0}' modified successfully.", bentFabricSheet.Id.IntegerValue))
End Sub
'#End Region