Question

I’m new to C# and have created a basic program that I’m running through Visual Studio 2010. When the window is closed, the program stops. However there’s a delay of a few seconds before the IDE goes back to edit mode. How can I immediately end the program when the window is closed?

private void button1_Click(object sender, EventArgs e){
    While (Visible) {
        for (int c = 0; c < 254) {
            this.BackColor = Color.FromArgb(c, 255 - c, c);
            Application.DoEvents();
            System.Threading.Thread.Sleep(3);
        }
        for (int c = 254; c >= 0) {
            this.BackColor = Color.FromArgb(c, 255 - c, c);
            Application.DoEvents();
            System.Threading.Thread.Sleep(3);
        }
    }
}

I’ve tried removing “System.Threading.Thread.Sleep(3);” from the loops but that still did not help fix the issue. I’ve also been able to reproduce this on multiple machines. Any ideas why this could be happening?

Answer 1

The delay happens because the for loops need to finish before the while loop can check if Visible is still true. I was able to fix it by adding && Visible == true to the conditional test in each for loop. That way the loop ends as soon as Visible turns false.