static void Main()
{
ILl = new EfLoadL();
DataTable dt = DataTableHelper.QueryableToTable(ILl.LoadLevellingTable);
dt.TableName = "LoadLevelling"; // il nome della tabella nel db
DataTable schema = DataTableHelper.QueryableToTable(ILl.SchemaTable);
schema.TableName = "Schema";
DataSet ds = new DataSet();
ds.Tables.Add(dt);
ds.Tables.Add(schema);
CalcEXlogicClass.Execute(ds, "loadl", "LoadLevelling");
DataTable returndt = ds.Tables[0];
// converte il datatable
var retlist = DataTableHelper.TableToList <LoadLevelling>(returndt).ToList();
ILl.MassiveAddData(retlist);
ILl.MassiveSaveData();
}