ArcGIS Pro 2.6 API Reference Guide
GetLayout Method
Example 

ArcGIS.Desktop.Layouts Namespace > LayoutProjectItem Class : GetLayout Method
Loads and returns the Layout associated with the LayoutPrjectItem. This method must be called on the MCT. Use QueuedTask.Run.
Syntax
public Layout GetLayout()
Public Function GetLayout() As Layout

Return Value

Exceptions
ExceptionDescription
This method or property must be called within the lambda passed to QueuedTask.Run.
Example
//Open a layout project item in a new view.
//A layout project item may exist but it may not be open in a view. 

//Reference a layout project item by name
LayoutProjectItem someLytItem = Project.Current.GetItems<LayoutProjectItem>().FirstOrDefault(item => item.Name.Equals("MyLayout"));

//Get the layout associated with the layout project item
Layout layout = await QueuedTask.Run(() => someLytItem.GetLayout());  //Worker thread

//Create the new pane
ILayoutPane iNewLayoutPane = await ProApp.Panes.CreateLayoutPaneAsync(layout); //GUI thread
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

LayoutProjectItem Class
LayoutProjectItem Members