private void SendEmailAllGroup()
{
string emailList = "";
foreach (string email in EmailListBox.Items)
{
emailList += $"{email.ToString()} ";
}
SendToMultipleUsers.SendEmail(emailList, txtsubject.Text, txtbody.Text);
MessageBox.Show("Successfully sended!");
}
private void button5_Click_1(object sender, EventArgs e)
{
SendToMultipleUsers.SendEmail();
}