gridControl.ItemsSource = (from em in entityFW.table1 select em).ToList();

gridControl.ItemsSource = (from em in selectedTableNameAsVar select em).ToList();

entityFW entityFW= new entityFW();
EntitySimpleDataSource entity = new EntitySimpleDataSource();
entity.Path = "entityFW.table1";
gridControl.ItemsSource = "{Binding Data, Source={StaticResource EntitySimpleDataSource}}";
gridControl.RefreshData();