Gridview row deleting dynamically

protected void btnDelete_Click(object sender, EventArgs e)
{
DataTable DtList = null
System.Web.UI.WebControls.ImageButton imgbtn = (System.Web.UI.WebControls.ImageButton)sender

int id = int.Parse(imgbtn.CommandArgument) - 1;DtList = (DataTable)ViewState["DataTable"];DtList.Rows.RemoveAt(id );
DtList.AcceptChanges();gdvSearchResult.DataSource = DtList;
gdvSearchResult.DataBind();
ViewState["DataTable"] = DtList;
}