Round up decimal value upto two decimal places in ASP.Net GridView

Hi Greetings for the Day

i hav one data table in which some decimal values are up 6 decimal places.. im trying to bind that Data table to DataGridView while binding i want to round decimal values up to two decimal palces here is my code

dt.Columns.Add("Orderid", typeof(string));
            dt.Columns.Add("tagnumber", typeof(string));
            dt.Columns.Add("Minimum Value", typeof(string));
            dt.Columns.Add("Maximum Value", typeof(string)); 
            int count = ds.Tables[0].Rows.Count;
            for (int i = 0; i < count; i++)
            {

                DataRow dr = null;
                dr = dt.NewRow();
              
                dr["tagnumber"] = ds.Tables[0].Rows[i]["min"].ToString();
                dr["quantity"] = ds.Tables[0].Rows[i]["max"].ToString();
                dr["issuedby"] = ds.Tables[0].Rows[i]["sum"].ToString();


                dt.Rows.Add(dr);
            }

            gvdemo.DataSource = dt.DefaultView;
    

howshould i round up while binding..?

Thanks In Advance