[C#] TimeSpan

            //DateTime currentTime = DateTime.Now;
            //TimeSpan stepTime = currentTime.Subtract(_startTime);
            //TimeSpan elapsedTime = currentTime.Subtract(_globalStartTime);
            //_startTime = currentTime;
           
            ////TimeSpan span = new TimeSpan(;


            //timePrevious = DateTime.Now;
            //timeCurrent = DateTime.Now.AddDays(1);
            //timeSubtracted = timeCurrent.Subtract(timePrevious).TotalMinutes



Use below.

             Globals.txt2 = DateTime.Now.ToString("HH:mm:ss");
            Globals.time2 = Convert.ToDateTime(Globals.txt2);

            TimeSpan dt = Globals.time2.Subtract(Globals.time1);

            string ttt = Globals.txt1 + "  " + Globals.txt2 + " " + dt.Seconds.ToString();
            //MessageBox.Show(ttt);

            Globals.txt1 = Globals.txt2;
            Globals.time1 = Convert.ToDateTime(Globals.txt1);