Changing windows 10 time in C#

private void button1_Click_1(object sender, EventArgs e)
        {
            
            h1 = h;//hours
            m1 = m;//minutes
            s1 = s;//seconds
            //booleano is my boolean value that starts in true
            //MessageBox.Show(""+booleano);
            if (booleano)
            {
                foreach (String st in tokens1)
                {
                    time = tokens1[0] + "," + tokens1[1] + "," + tokens1[2] + "," + h1 + "," + m1 + "," + s1 + "," + false.ToString() + "," + true.ToString();
                }

                System.IO.File.WriteAllText(Application.StartupPath + "\\time.txt", time);
                //MessageBox.Show(Application.StartupPath);               
                st.wYear = short.Parse(""+2014); // must be short
                st.wMonth = short.Parse(""+1);
                st.wDay = short.Parse(""+1);
                SetSystemTime(ref st);
                booleano = false;
            }
            else
            {
                booleano = true;
                FileStream file = new FileStream(Application.StartupPath+"\\time.txt", FileMode.Open, FileAccess.Read);
                StreamReader sr = new StreamReader(file);
                sr.ReadLine();
                var textLines = File.ReadAllLines(Application.StartupPath + "\\time.txt");
                foreach (var line in textLines)
                {
                    string[] dataArray = line.Split(',');
                    st.wYear= short.Parse(dataArray[0]);
                    st.wMonth = short.Parse(dataArray[1]);
                    st.wDay = short.Parse(dataArray[2]);
                    st.wHour = short.Parse(dataArray[3]);
                    st.wMinute = short.Parse(dataArray[4]);
                    st.wSecond = short.Parse(dataArray[5]);                    
                }
                file.Close();
                SetSystemTime(ref st);
            }
            
        }