Hello There how to draw Trendline

Hello There Need I little bit of help here ! 

how we draw trendline by our cbot
on like meta4 they have function like ObjectCreate() that have parameter like this

bool  ObjectCreate(
   string        object_name,   // object name
   ENUM_OBJECT   object_type,   // object type
   int           sub_window,    // window index
   datetime      time1,         // time of the first anchor point
   double        price1,        // price of the first anchor point
   datetime      time2=0,       // time of the second anchor point
   double        price2=0,      // price of the second anchor point
   datetime      time3=0,       // time of the third anchor point
   double        price3=0       // price of the third anchor point
   );


so on cBot how could we do it. I try to search on API and I found Chart.DrawTrendLine() and it has parameter in the same way 
public ChartTrendLine DrawTrendLine(string name, DateTime time1, double y1, DateTime time2, double y2, Color color, int thickness, LineStyle lineStyle)

my question is how do we set time1 and time2 I've try to search DateTime class but found nothing so don't know how to assign it. 

Thank you.