public LayerCreationParams( 
   CIMDataConnection dataConnection
)

// Create a connection to the WMS server
var serverConnection = new CIMInternetServerConnection { URL = "URL of the WMS service" };
var connection = new CIMWMSServiceConnection { ServerConnection = serverConnection };

// Add a new layer to the map
var layerParams = new LayerCreationParams(connection);
await QueuedTask.Run(() =>
{
  var layer = LayerFactory.Instance.CreateLayer<FeatureLayer>(layerParams, MapView.Active.Map);
});

CIMStandardDataConnection cIMStandardDataConnection = new CIMStandardDataConnection()
{
  WorkspaceConnectionString = @"SWAPXY=TRUE;SWAPXYFILTER=FALSE;URL=http://sampleserver6.arcgisonline.com/arcgis/services/SampleWorldCities/MapServer/WFSServer;VERSION=2.0.0",
  WorkspaceFactory = WorkspaceFactory.WFS,
  Dataset = "Continent",
  DatasetType = esriDatasetType.esriDTFeatureClass
};

// Add a new layer to the map
var layerPamsDC = new LayerCreationParams(cIMStandardDataConnection);
await QueuedTask.Run(() =>
{
  Layer layer = LayerFactory.Instance.CreateLayer<FeatureLayer>(layerPamsDC, MapView.Active.Map);
});

await QueuedTask.Run(() =>
{
  Map map = MapView.Active.Map;
  Geodatabase geodatabase = new Geodatabase(new DatabaseConnectionFile(new Uri(@"C:\Connections\mySDE.sde")));
  CIMSqlQueryDataConnection sqldc = new CIMSqlQueryDataConnection()
  {
    WorkspaceConnectionString = geodatabase.GetConnectionString(),
    GeometryType = esriGeometryType.esriGeometryPolygon,
    OIDFields = "OBJECTID",
    Srid = "102008",
    SqlQuery = "select * from MySDE.dbo.STATES",
    Dataset = "States"
  };
  var lcp = new LayerCreationParams(sqldc)
  {
    Name = "States"
  };
  FeatureLayer flyr = LayerFactory.Instance.CreateLayer<FeatureLayer>(lcp, map);
});