private void button1_Click(object sender, EventArgs e)
{
FApplication.StartLongOperation();
progressBar1.Value = 0;
for (var i = 0; i < progressBar1.Maximum * multiplier; ++i)
{
if (i % multiplier == 0)
{
progressBar1.Value = i / multiplier;
}
}
progressBar1.Value = 0;
Close();
}