كيف يمكن حذف أول 1000 صف من ملف csv

void WriteToLogFile(string nothing)
{
string Date=TimeDay(TimeCurrent())+"/"+TimeMonth(TimeCurrent())+"/"+TimeYear(TimeCurrent());
string TIME=TimeHour(TimeCurrent())+":"+TimeMinute(TimeCurrent())+":"+TimeSeconds(TimeCurrent());
   
string AUDCAD_info= DoubleToStr(MarketInfo("AUDCAD"+suffix,MODE_SPREAD)/10,2);
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string filename = broker+" Spreads/"+broker+" "+" Spread "+Month()+"-"+Year()+".csv";
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string AUDCAD = broker+";"+"AUDCAD"+";"+Date+";"+TIME+";"+AUDCAD_info;
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int handle = FileOpen(filename,FILE_READ|FILE_WRITE|FILE_CSV);
   if (handle>1)
   { 
      FileWrite(handle, "Broker","Symbol","Date","Time","Spread","Bid","Ask");
      FileSeek(handle, 0, SEEK_END); // go to end of file
      FileWrite(handle, AUDCAD);
      FileWrite(handle, AUDCHF);
      FileWrite(handle, AUDJPY);
      FileWrite(handle, AUDNZD);
      FileWrite(handle, AUDUSD);
      FileWrite(handle, CADCHF);
      FileWrite(handle, CADJPY);
      FileWrite(handle, CHFJPY);
      FileWrite(handle, EURAUD);
      FileWrite(handle, EURCAD);
      FileWrite(handle, EURCHF);
      FileWrite(handle, EURGBP);
      FileWrite(handle, EURJPY);
      FileWrite(handle, EURNZD);
      FileWrite(handle, EURUSD);
      FileWrite(handle, GBPAUD);
      FileWrite(handle, GBPCAD);
      FileWrite(handle, GBPCHF);
      FileWrite(handle, GBPJPY);
      FileWrite(handle, GBPNZD);
      FileWrite(handle, GBPUSD);
      FileWrite(handle, NZDCAD);
      FileWrite(handle, NZDCHF);
      FileWrite(handle, NZDJPY);
      FileWrite(handle, NZDUSD);
      FileWrite(handle, USDCAD);
      FileWrite(handle, USDCHF);
      FileWrite(handle, USDJPY);
      FileClose(handle);
   }
}