get secons from timespan

Vector2 wp = Camera.main.ScreenToWorldPoint(Input.mousePosition);
DateTime lastt = DateTime.Now;
Debug.Log(lastt);
this.gameObject.transform.position = Vector2.Lerp(this.gameObject.transform.position, wp, 1 / (duration * (Vector2.Distance(gameObject.transform.position, endPoint))));
DateTime nowt = DateTime.Now;

            TimeSpan minu = lastt - nowt;
            int min = minu.Seconds;
            Debug.Log(min);

min value has always 0

81424-k-003.png

like image i want to get 3seconds diffrence.
what do i have to do for it ?

To work lastt need be a field in the class not a local variable and you need set lastt = DateTime.Now; after the timespan calculation not before.