private void Overwrite_Click(object sender, EventArgs e)
 {
     this.DialogResult = DialogResult.OK;
     this.behaviour    = SelectBehave.OverWrite;
     Close();
 }
 private void DeleteFrom_Click(object sender, EventArgs e)
 {
     this.DialogResult = DialogResult.OK;
     this.behaviour    = SelectBehave.Delete;
     Close();
 }
 private void Cancel_Click(object sender, EventArgs e)
 {
     this.DialogResult = DialogResult.Cancel;
     this.behaviour    = SelectBehave.None;
     Close();
 }