DateTime
Date
DateTime dt1=Textbox1.Text; DateTime dt2=Textbox2.Text; TimeSpan t=dt2.Subtract(dt1); string diff = t.Hours.ToString()+":"+t.Minutes.ToString() + ":" + t.Seconds.ToString();
DateTime dt1 = DateTime.ParseExact(In1, "HH:mm:ss", new DateTimeFormatInfo()); DateTime dt2 = DateTime.ParseExact(Out1, "HH:mm:ss", new DateTimeFormatInfo()); TimeSpan ts = dt1.Subtract(dt2);
DateTime in1 = DateTime.Parse(dt_display.Rows[i]["In1"].ToString()); DateTime out1 = DateTime.Parse(dt_display.Rows[i]["Out1"].ToString()); TimeSpan diff = out1.Subtract(in1);
var
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