SketchEditor rotation does not allow to set rotation axis point

[jcarlos]

I'm using SketchEditor.StartAsync()  to rotate an existing graphic geometry. However, I have a problem because the rotation center changes every time that I rotate the figure. There is any way to select or set the axis of rotation? Or how could I rotate it correctly?

I'm using ArcGISRuntime 100.12.0 in a WPF application with .net framework.

I attach some screenshots of the problem.

I want to rotate this figure:  

 

I rotate it a couple of times:  

When I try to return to the origin position, the shape does not match because, in every previous rotation, the axis to the rotation was different.

My code:

try 
            { 
                AssociatedObject.SketchEditor = new SketchEditor 
                { 
                    IsEnabled = true 
                }; 
                SketchEditConfiguration sketchConfig = new SketchEditConfiguration() 
            { 
                AllowRotate = true, 
                AllowVertexEditing = false, 
                AllowMove = false, 
                ResizeMode = SketchResizeMode.None, 
                VertexEditMode = SketchVertexEditMode.InteractionEdit, 
                RequireSelectionBeforeDrag = false 
            }; 
                SketchCreationMode creationMode = SketchCreationMode.Polygon; 
                SketchEditorGeometry = await AssociatedObject.SketchEditor.StartAsync(g.Geometry, creationMode, sketchConfig); 
                if (SketchEditorGeometry == null) 
                { 
                    CancelCurrentActions(); 
                } 
                else 
                { 
                    // change old geometry.
                } 
            } 
            catch (Exception ex) 
            { 
// … 
}