How to remove sorting from dataview

Hello, I have a dataview, source of dataview is a view from sql server. Dataview is sorted, like this: dv_building.Sort = "bld_number", this dataview is a datasource to my datagird1: DataGrid1.DataSource = dv_building. Now I want to remove sorting dv_building.Sort = String.Empty, but the view of my data grid was changed, because sorting was removed, ie dataview was returned to their default sorting, probably by clustered index. How can I remove sorting, but the actual sorting remain by bld_number? Is it possible? Thanks Ramunas Balukonis