C# 将实体框架结果返回为JSON

我希望以json格式返回linq查询结果。我已经找了好几个小时了

这是我的密码：

public IEnumerable<callersW> GetAllCallersF()
{
  testCDREntities1 context = this.CurrentDataSource;
  var query = (
    from oneCaller in CurrentDataSource.TestTables
    select new
    {
      Created = oneCaller.Created,
      Answered = oneCaller.Answered,
      Destroyed = oneCaller.Destroyed,
      CallerID = oneCaller.CallerId,
      CalledID = oneCaller.CalledId,
      DisconnectionCode = oneCaller.DisconnectionCode,
      RTP_Caller_G107MOS = oneCaller.RTP_Caller_G107MOS,
      RTP_Caller_LostPackets = oneCaller.RTP_Caller_LostPackets,
      RTP_Caller_MaxRfc3550Jitter = oneCaller.RTP_Caller_MaxRfc3550Jitter,
      RTP_Caller_MeanRfc3550Jitter = oneCaller.RTP_Caller_MeanRfc3550Jitter,
      RTP_Called_G107MOS = oneCaller.RTP_Called_G107MOS,
      RTP_Called_LostPackets = oneCaller.RTP_Called_LostPackets,
      RTP_Called_MaxRfc3550Jitter = oneCaller.RTP_Called_MaxRfc3550Jitter,
      RTP_Called_MeanRfc3550Jitter = oneCaller.RTP_Called_MeanRfc3550Jitter,
    }).ToList()
    .Select(x => new callersW
    {
      Created = Convert.ToDateTime(x.Created),
      Answered = Convert.ToDateTime(x.Answered),
      Destroyed = Convert.ToDateTime(x.Destroyed),
      CallerID = x.CallerID,
      CalledID = x.CalledID,
      DisconnectionCode = Convert.ToInt32(x.DisconnectionCode),
      RTP_Caller_G107MOS = Convert.ToDouble(x.RTP_Caller_G107MOS),
      RTP_Caller_LostPackets = Convert.ToDouble(x.RTP_Caller_LostPackets),
      RTP_Caller_MaxRfc3550Jitter = Convert.ToDouble(x.RTP_Caller_MaxRfc3550Jitter),
      RTP_Caller_MeanRfc3550Jitter = Convert.ToDouble(x.RTP_Caller_MeanRfc3550Jitter),
      RTP_Called_G107MOS = Convert.ToDouble(x.RTP_Called_G107MOS),
      RTP_Called_LostPackets = Convert.ToDouble(x.RTP_Called_LostPackets),
      RTP_Called_MaxRfc3550Jitter = Convert.ToDouble(x.RTP_Called_MaxRfc3550Jitter),
      RTP_Called_MeanRfc3550Jitter = Convert.ToDouble(x.RTP_Called_MeanRfc3550Jitter)
    }).ToList();

  return  query;
}

public IEnumerable GetAllCallersF（）
{
TestCDrenties1 context=this.CurrentDataSource；
变量查询=(
来自CurrentDataSource.TestTables中的oneCaller
选择新的
{
Created=oneCaller.Created，
已回答=一个来电者。已回答，
销毁=一个调用方。已销毁，
CallerID=oneCaller.CallerID，
CalledID=oneCaller.CalledID，
DisconnectionCode=oneCaller.DisconnectionCode，
RTP_Caller_G107MOS=oneCaller.RTP_Caller_G107MOS，
RTP_Caller_LostPackets=oneCaller.RTP_Caller_LostPackets，
RTP_Caller_MaxRfc3550Jitter=oneCaller.RTP_Caller_MaxRfc3550Jitter，
RTP_Caller_MeanRfc3550Jitter=oneCaller.RTP_Caller_MeanRfc3550Jitter，
RTP_称为_G107MOS=oneCaller.RTP_称为_G107MOS，
RTP_Called_LostPackets=oneCaller.RTP_Called_LostPackets，
RTP_称为_MaxRfc3550Jitter=oneCaller.RTP_称为_MaxRfc3550Jitter，
RTP_称为_MeanRfc3550Jitter=oneCaller.RTP_称为_MeanRfc3550Jitter，
})托利斯先生（）
.选择（x=>新呼叫者W
{
Created=Convert.ToDateTime（x.Created），
已应答=转换到当前时间（x已应答），
销毁=转换为ToDateTime（x.Destroyed），
CallerID=x.CallerID，
CalledID=x.CalledID，
DisconnectionCode=转换为32（x.DisconnectionCode），
RTP_Caller_G107MOS=Convert.ToDouble（x.RTP_Caller_G107MOS），
RTP_Caller_LostPackets=Convert.ToDouble（x.RTP_Caller_LostPackets），
RTP_Caller_MaxRfc3550Jitter=Convert.ToDouble（x.RTP_Caller_MaxRfc3550Jitter），
RTP_Caller_MeanRfc3550Jitter=Convert.ToDouble（x.RTP_Caller_MeanRfc3550Jitter），
RTP_称为_G107MOS=Convert.ToDouble（x.RTP_称为_G107MOS），
RTP_称为_LostPackets=Convert.ToDouble（x.RTP_称为_LostPackets），
RTP_称为_MaxRfc3550Jitter=Convert.ToDouble（x.RTP_称为_MaxRfc3550Jitter），
RTP_称为_MeanRfc3550Jitter=Convert.ToDouble（x.RTP_称为_MeanRfc3550Jitter）
}).ToList（）；
返回查询；
}

有人能帮我吗

添加到项目并序列化对象，例如：

string json = JsonConvert.SerializeObject(query);

更多示例。

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