About Datetime...

i solved this problem by using just two txtbox'es. I'll write how i solved because that would be some people who are going to use it in the future. :

private void timer1_Tick(object sender, EventArgs e)

textBox1.Text = DateTime.Now.ToLongTimeString();

if (textBox2.Text == textBox1.Text)

System.Diagnostics.Process.Start("shutdown", "-f -s");

DateTime.Now.Minute will be equal to the numeric value of the current minute.

DateTime.Now.Minute.ToString() will be equal to the string value of the current minute.

The Convert.ToString() basically is called to convert a non-string value to a string. So if the value to be converted is already a string, you don't need to call this anymore.

DateTime.Now will be equal to the DateTime value of the current date & time.

DateTime.Now.ToString() will be equal to the string value of the current date & time.

ToString() method is overloaded and takes in certain parameters as format of the result you want it to be.

Let's assume it's November 21, 2007 9 hours 51 minutes 16 seconds in the evening.

Calling DateTime.Now.ToString() will result in "11/21/2007 9:51:16 PM"

If we call DateTime.Now.ToString("hh") instead, it will pick just the hour part of the current DateTime = "09"

If we call DateTime.Now.ToString("mm") instead, it will pick just the minute part of the current DateTime = "51"

This link about String formatting in c# provides different formats for the Datetime.

You could change your condition instead to:

if (DateTime.Now.ToString("mm") == dak_textBox.Text)
{
    if (DateTime.Now.ToString("hh") == saat_textBox.Text)
    {
        System.Diagnostics.Process.Start("shutdown", "-f -s");
    }
}

Hope this helps.

Cheers,

Jan