public BulkLayerCreationParams( 
   IEnumerable<Uri> uris
)

{
    //Uris to the datasets for the layers to be created
    var uriShp = new Uri(@"c:\data\roads.shp");
    var uriSde = new Uri(@"c:\MyDataConnections\MySDE.sde\Census");
    var uri = new Uri(@"http://sampleserver6.arcgisonline.com/arcgis/rest/services/NapervilleShelters/FeatureServer/0");
    // Create a list of URIs to be used for creating multiple layers
    var uris = new List<Uri>() { uriShp, uriSde, uri }; ;

    // set the index and visibility
    var blkParams = new BulkLayerCreationParams(uris);
    blkParams.MapMemberPosition = MapMemberPosition.Index;
    blkParams.MapMemberIndex = 2;
    blkParams.IsVisible = false;
    // Create multiple layers using the BulkLayerCreationParams
    //Note: Needs QueuedTask to run
    var layers = LayerFactory.Instance.CreateLayers(blkParams, MapView.Active.Map);
}

{
    string pathToGeoPackage = @"C:\Data\Geopackage\flooding.gpkg";
    //Create lists to hold the URIs of the layers and tables in the geopackage
    var layerUris = new List<Uri>();
    var tableUris = new List<Uri>();
    //Create an item from the geopackage
    //Note: Needs QueuedTask to run
    var item = ItemFactory.Instance.Create(pathToGeoPackage, ItemFactory.ItemType.PathItem);
    var children = item.GetItems();
    //Collect the table and spatial data in the geopackage
    foreach (var child in children)
    {
        var childPath = child.Path;

        if (child.TypeID == "sqlite_table")
            tableUris.Add(new Uri(childPath));
        else
            layerUris.Add(new Uri(childPath));
    }
    //Add the spatial data in the geopackage using the BulkLayerCreationParams
    if (layerUris.Count > 0)
    {
        BulkLayerCreationParams bulklcp = new BulkLayerCreationParams(layerUris);
        LayerFactory.Instance.CreateLayers(bulklcp, MapView.Active.Map);
    }
    // add the tables separately
    foreach (var tableUri in tableUris)
    {
        StandaloneTableFactory.Instance.CreateStandaloneTable(tableUri, MapView.Active.Map);
    }
}