public esriGeometryType GeometryType {get; set;}

{
    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"
    };
    //Note: Needs QueuedTask to run
    FeatureLayer flyr = LayerFactory.Instance.CreateLayer<FeatureLayer>(lcp, map);
}