ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Desktop.Core Namespace / IProjectMultiItem Interface
Members Example

IProjectMultiItem Interface
Implemented by items that support import
Syntax
public interface IProjectMultiItem 
Example
Item itemToImport = ItemFactory.Instance.Create(mxdPath);
await QueuedTask.Run(() => Project.Current.ImportItem(itemToImport as IProjectMultiItem));
Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

ArcGIS Pro version: 2.0 or higher.
See Also