private void button1_Click(object sender, EventArgs e) {     try     {         using (WFR2025.WfrControl wfrCtrl = new WFR2025.WfrControl())         {             wfrCtrl.Open(@"d:\test\sample.wfr");             wfrCtrl.Import("#1", WFR2025.IT.CSV_UTF8, @"d:\test\sample_utf8.csv", "", "Sep=[TAB];Quot=[NULL];Field=off");             wfrCtrl.Create();             wfrCtrl.DoModal(this.Handle);         }     }     catch (Exception ex)     {         MessageBox.Show(ex.Message, "ERROR");     } }