ArcGIS Pro 2.3 API Reference Guide
ConvertToGraphics Method
Example 

ArcGIS.Desktop.Layouts Namespace > Element Class : ConvertToGraphics Method
Convert the element to graphics. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
Public Function ConvertToGraphics() As Element()
public Element[] ConvertToGraphics()

Return Value

The list result will contain just one, selected GroupElement that contains all the individual element within it.
Exceptions
ExceptionDescription
This method must be called within the lambda passed to QueuedTask.Run.
Remarks
The element is removed from the layout and the new graphic elements are added in its place.
Example
//Convert a legend to a graphic and move the Title to the bottom of the legend and also move
//the label in the contents pane to the bottom of the list.

//Perform on the worker thread
await QueuedTask.Run(() =>
{
  Legend leg = layout.FindElement("Legend") as Legend;
  GroupElement result = leg.ConvertToGraphics().First() as GroupElement;
  Element firstElm = result.Elements.First();  //Note: Bottom element is first in drawing order.
  foreach (Element elm in result.Elements)
  {
    if (elm.Name == "Title")
    {
      elm.SetY(firstElm.GetY() - 0.25);  //Move title below other legend elements
      elm.SetTOCPositionAbsolute(result, false);  // Move Title item in TOC to bottom as well
    }
  }
});
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

Element Class
Element Members