asp.net - Threads in c# to be executed at 1 minute intervals of server time -

i have created thread in c# application. code given below.

[webmethod] public void start() {     thread thread = new thread(new threadstart(workthreadfunction));     thread.start(); } [webmethod] public void stop() {     thread thread = new thread(new threadstart(workthreadfunction));     thread.abort(); } public void workthreadfunction() {     try     {               timezone zone = timezone.currenttimezone;             datetime dt = datetime.now.addhours(12);             dt = dt.addminutes(30);             timespan offset = zone.getutcoffset(datetime.now);             string s = "insert tb_log(timestamp) values('" + dt + "')";             class1 obj = new class1();             string res = obj.executequery(s);       }     catch     {     } } 

when run code value enters @ 1 time table. need execute thread @ 1 min intervals throughout day, week , year. how make possible? correct me if code had written correct or not. i'm new threads in c#. please me out. , regards..

public webserviceclass : webservice {     private boolean terminated = false;     private boolean running = false;      [webmethod]     public void start()     {         if (running)         {             //already running!         }         else         {             running = true;             terminated = false;             //start new thread run @ requested interval             thread thread = new thread(new threadstart(workthreadfunction));             thread.start();         }     }      [webmethod]     public void stop()     {         //tell thread stop running after has completed it's current loop         terminated  = true;     }      public void workthreadfunction()     {         try         {             datetime nextloopstart = datetime.now;             while (!terminated)             {                 timezone zone = timezone.currenttimezone;                 datetime dt = datetime.now.addhours(12);                 dt = dt.addminutes(30);                 timespan offset = zone.getutcoffset(datetime.now);                 string s = "insert tb_log(timestamp) values('" + dt + "')";                 class1 obj = new class1();                 string res = obj.executequery(s);                      while (datetime.now < nextloopstart)                 {                     system.threading.thread.sleep(100);                 }                     nextloopstart += new timespan(0,1,0);             }             //reset terminated host class knows thread no longer running          }         catch (threadabortexception)         {             //logwarning("info: thread aborted");         }         catch (exception e)         {             //logerror("error in execute: " + e.message);         }                 {             running = false;         }     } }