public new int MapMemberIndex {get; set;}

{
    //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);
}

{

    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");

    var lcpShp = new FeatureLayerCreationParams(uriShp);
    lcpShp.Name = "Roads";
    lcpShp.IsVisible = false;
    lcpShp.DefinitionQuery = new DefinitionQuery("shpQuery", "OBJECTID > 10");

    var lcpSde = new FeatureLayerCreationParams(uriSde);
    lcpSde.Name = "Census Polygons";
    lcpSde.IsVisible = true;

    var lcpService = new FeatureLayerCreationParams(uri);
    lcpService.Name = "Shelters";
    lcpService.IsVisible = true;
    // set some renderer here ...
    //lcpService.RendererDefinition = ...

    var lcps = new List<FeatureLayerCreationParams>();
    lcps.Add(lcpShp);
    lcps.Add(lcpSde);
    lcps.Add(lcpService);

    var blkParams = new BulkLayerCreationParams(lcps);
    // set the positioning on the BulkLayerCreationParams
    blkParams.MapMemberPosition = MapMemberPosition.Index;
    blkParams.MapMemberIndex = 0;

    var layers = LayerFactory.Instance.CreateLayers(blkParams, MapView.Active.Map);
}

{

    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");

    var lcpShp = new FeatureLayerCreationParams(uriShp);
    lcpShp.Name = "Roads";
    lcpShp.IsVisible = false;
    lcpShp.DefinitionQuery = new DefinitionQuery("shpQuery", "OBJECTID > 10");

    var lcpSde = new FeatureLayerCreationParams(uriSde);
    lcpSde.Name = "Census Polygons";
    lcpSde.IsVisible = true;

    var lcpService = new FeatureLayerCreationParams(uri);
    lcpService.Name = "Shelters";
    lcpService.IsVisible = true;
    // set some renderer here ...
    //lcpService.RendererDefinition = ...

    var lcps = new List<FeatureLayerCreationParams>();
    lcps.Add(lcpShp);
    lcps.Add(lcpSde);
    lcps.Add(lcpService);

    var blkParams = new BulkLayerCreationParams(lcps);
    // set the positioning on the BulkLayerCreationParams
    blkParams.MapMemberPosition = MapMemberPosition.Index;
    blkParams.MapMemberIndex = 0;

    // set the rollback behavior
    // - rollback if one or more layers cannot be created due to an invalid data source
    blkParams.RollbackBehavior = LayerCreationRollbackBehavior.RollbackOnMissingLayers;

    var layers = LayerFactory.Instance.CreateLayers(blkParams, MapView.Active.Map);
}