Set/Get SystemTime in Java /C# -

i have code in java systemtime:

  private static  simpledateformat sdf = new simpledateformat("yyyy-mm-dd hh.mm.ss");   //gets time of boardtime object in milliseconds    public long getms() {           return super.gettimeinmillis();   }  //sets time of boardtime object in milliseconds   public void setms(long ms) {       super.settimeinmillis(ms);   } 

i tried convert c#: first part, used datetimeformatinfo class:

private static datetimeformatinfo sdf = new datetimeformatinfo(); 

for getting system time in milliseconds used timespan:

 long milliseconds = datetime.now.ticks / timespan.tickspermillisecond; 

i not know if have done until correct or not can not find c# equivalent settime.

this have done until now:

  private static datetimeformatinfo sdf = new datetimeformatinfo();     public long getms(){      long milliseconds = datetime.now.ticks / timespan.tickspermillisecond;        return milliseconds;    }     public void setms(long ms){       } 

thanks in advance

if want set/get time milliseconds, can c# timespan:

private timespan time  public void setms(long ms) {     this.time = timespan.frommilliseconds(ms); }  public long getms() {     return this.time.totalmilliseconds; }