找不到方法:“Boolean System.Runtime.Serialization

Question

下面是方法的代码            string linkStr = "";            DataTable dt = PageString.GetPage(10, "Message", "ID", "Default.aspx", "[ID],[Title],[Content],[CreateTime],[UpdateTime],[UserId],[ParentId],[Email],[HomePage],[SupportCount]", "1=1", "CreateTime desc", out linkStr, 1);            string jsonString = JsonConvert.SerializeObject(new { linkStr = linkStr, result = dt }); 报错的是下面的提示，我之前用过好像没有这种错误找不到方法:“Boolean System.Runtime.Serialization.DataContractAttribute.get_IsReference()”。

Answer 1

.NET Framework是什么版本？