WebServies返回的XML变成乱

public List<Data> GetDataList(int count)
    {
        List<Data> data = new List<Data>();
        for (int i = 0; i < count; i++)
        {
            data.Add(new Data
            {
                TopID=i,
                UserID=i*10,
                Img = "Image/me.jpg",
                Name = "姓名" + i.ToString(),
                content = "中草药虐待虽则上台阶开工字斟句酌",
                Time = DateTime.Now.AddDays(1).ToString()
            });
        }
        return data;
    }

    [WebMethod]
    public string GetJsonData(int count)
    {
        List<Data> data = this.GetDataList(count);
        return JsonHelper.ToJson(data);
    }

    [WebMethod]
    public string GetXmlData(int count)
    {
        List<Data> data = this.GetDataList(count);
        XElement xmlData = new XElement("Root");
        foreach (Data item in data)
        {
            XElement ele = new XElement(
                new XElement("Info",
                    new XElement("Img", item.Img),
                    new XElement("Name", item.Name),
                    new XElement("Content", item.content),
                    new XElement("Time", item.Time)
                    ));
            xmlData.Add(ele);
        }
        return xmlData.ToString();
    }

function GetDataFromServices() {
            $.ajax({
                type: "POST",
                url: "MyWebService.asmx/GetXmlData",
                data: { count: 5 },
                dataType: "text/xml",
                success: function(data) {
                    alert(data);
                },
                error: function(msg) { alert(msg); }
            });
        }