C# 隊列、鎖、異步

//創建隊列
private static ConcurrentQueue<ad_playrecord_count> _Concurrenplayrecord_count { get; set; }
//實現隊列
_Concurrenplayrecord_count = new ConcurrentQueue<ad_playrecord_count>();
//進隊列 
ad_playrecord_count prcModel = new ad_playrecord_count()；
prcModel.XX="2222";
_Concurrenplayrecord_count.Enqueue(prcModel);
//出隊列
 while (_Concurrenplayrecord_count.Count > 0)
 {
  ad_playrecord_count prcModel_queue = null;
  _Concurrenplayrecord_count.TryDequeue(out prcModel_queue);
  context.ad_playrecord_count.Add(prcModel_queue);
  context.SaveChanges();
 }

 //建立鎖，用來傳文件
private static object o = new object();
lock (o)
{
      file.SaveAs(FilePath + FileName + fileExt);
}                     

 Task t1 = Task.Factory.StartNew(() => //創建t1
{

});
 Task t2 = Task.Factory.StartNew(() => //創建t2
{

});
Task.WaitAll(t1, t2);//等待t1，t2執行完畢