public static frmSubscribePersonImport GetInstance()
{
if (frmSubscribersImport == null)
{
frmSubscribersImport = new frmSubscribePersonImport();
}
return(frmSubscribersImport);
}
private void button1_Click(object sender, EventArgs e)
{
frmSubscribePersonImport fm = frmSubscribePersonImport.GetInstance();
fm.ShowDialog();
}