Work with DataTable in ASP.net

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C#

i created a dataTable and Bind it in DataGrid in ASP.net so i want to Remove first row for example by Clicking Delete Event ...

protected void btnAddName_Click(object sender, EventArgs e)
{       
        DataTable dt;
        if (Session["dt"] == null)
        {
            dt = new DataTable();
            dt.Columns.Add(new DataColumn("lblName", typeof(string)));
        }
        else
        {
            dt = (DataTable)Session["dt"];
        }

        DataRow _dr = dt.NewRow();
        _dr["lblName"] = txtName.Text;
        dt.Rows.Add(_dr);

        gvName.DataSource = dt;
        //dt.Rows.Remove[dt[0]];
        gvName.DataBind();

        Session["dt"] = dt; 
    }

protected void gvName_RowCommand(object sender, GridViewCommandEventArgs e)
   {
       if (e.CommandName == "Delete")
       {
           int ReferralId = Convert.ToInt32(e.CommandArgument);
           // Delete the record
          Response.Write(ReferralId);


// Where should i Remove ReferralId from DataTable ????????


       }
   }