public class ItemFactory : IItemFactory  

/// Import a mxd
Item mxdToImport = ItemFactory.Instance.Create(@"C:\Projects\RegionalSurvey\LatestResults.mxd");
var addedMxd = await QueuedTask.Run(
              () => Project.Current.AddItem(mxdToImport as IProjectItem));

/// Add map package      
Item mapPackageToAdd = ItemFactory.Instance.Create(@"c:\Data\Map.mpkx");
var addedMapPackage = await QueuedTask.Run(
              () => Project.Current.AddItem(mapPackageToAdd as IProjectItem));

/// Add an exported Pro map
Item proMapToAdd = ItemFactory.Instance.Create(@"C:\ExportedMaps\Election\Districts.mapx");
var addedMapProjectItem = await QueuedTask.Run(
              () => Project.Current.AddItem(proMapToAdd as IProjectItem));

//Adding a folder connection
string folderPath = "@C:\\myDataFolder";
var folder = await QueuedTask.Run(() =>
{
  //Create the folder connection project item
  var item = ItemFactory.Instance.Create(folderPath) as IProjectItem;
  //If it is successfully added to the project, return it otherwise null
  return Project.Current.AddItem(item) ? item as FolderConnectionProjectItem : null;
});

//Adding a Geodatabase:
string gdbPath = "@C:\\myDataFolder\\myData.gdb";
var newlyAddedGDB = await QueuedTask.Run(() =>
{
  //Create the File GDB project item
  var item = ItemFactory.Instance.Create(gdbPath) as IProjectItem;
  //If it is successfully added to the project, return it otherwise null
  return Project.Current.AddItem(item) ? item as GDBProjectItem : null;
});

// Get layout Template Path from the project's home folder and combine it with a file name
var projectPath = CoreModule.CurrentProject.HomeFolderPath;
var layoutTemplateFilePath = System.IO.Path.Combine(projectPath, templateFileName);
// Create a new layout project item with the layout file path
await QueuedTask.Run(() =>
{
  // Create an IProjectItem using a layout template pagx file
  IProjectItem pagx = ItemFactory.Instance.Create(layoutTemplateFilePath) as IProjectItem;
  // Add the IProjectItem to the current project
  Project.Current.AddItem(pagx);
});

//Import a pagx into a project.

//Create a layout project item from importing a pagx file
await QueuedTask.Run(() =>
{
  IProjectItem pagx = ItemFactory.Instance.Create(
                            @"C:\Temp\Layout.pagx") as IProjectItem;
  Project.Current.AddItem(pagx);
});

//Note: Call within QueuedTask.Run()
Item reportToImport = ItemFactory.Instance.Create(reportFile);
Project.Current.AddItem(reportToImport as IProjectItem);

// Create the item to be uploaded, based on a local file
var itemToUpload = ItemFactory.Instance.Create(@"C:\Data\AddToMapCustomItem\AlaskaCitiesXY.csv");
// Define the tags for the item
string[] tags = new string[] { "ArcGIS Pro", "SDK", "Internal Demo" };
// Create the upload definition for the above item
UploadDefinition uploadDefinition = new UploadDefinition(
  ArcGISPortalManager.Current.GetActivePortal().PortalUri.ToString(),
  itemToUpload,
  tags
  );
// Upload the item to the Portal
var result = httpClient.Upload(uploadDefinition);

// Manage the result of the operation appropriately
if (result.Item1 == false)
  return;