private void Exit_Click(object sender, EventArgs e)
{
if (curCanvas.checkObjectExist())
{
DialogResult closeDialog = MessageBox.Show("Are you sure to close application?", "Close", MessageBoxButtons.YesNoCancel);
if (closeDialog == DialogResult.Yes)
{
this.Close();
}
else
{
return;
}
}
this.Close();
}
