Need Help regarding Timer converting string to int vut returning incorrect value

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C#

hi all
text file has following line
9.3213719
which is position of video at particular time in seconds
i want to show this value in textbox when video reaches at that time(stored in txt file)
i have successfully shown the value in textbox .....but there is a problem
according to txt file textbox should display value of 9 when video reaches at 9th second
but textbox displaying 6 instead of 9 at video position of 6 instead of 9th second
doing this in tick event of timer
code is below

private void timer1_Tick(object sender, EventArgs e)
        {
            string line = "aa";
            string file="e:\\"+list_nomber.Text+".txt";
            System.IO.StreamReader objreader;
            objreader=new System.IO.StreamReader(file);
            while((line=objreader.ReadLine())!= null)
            {
                x =Convert.ToDouble(line);
                end = Convert.ToInt32(x);
                if (Convert.ToInt32(MyVideo.CurrentPosition) == end)
                {
                    textBox1.Text = end.ToString();
                    timer1.Stop();
                
            }
            }
            objreader.Close();
}