Newtonsoft.Json

管理NuGet包，搜索Json，安装Newtonsoft.Json

string str = "";
IDictionary<string, string> dic = new Dictionary<string, string>();
dic.Add("TaskId", "1");
dic.Add("WorkflowId", "2");
dic.Add("ConditionStateDic", "3");
str = JsonConvert.SerializeObject(dic);
Console.WriteLine(str);
Console.WriteLine(JsonConvert.DeserializeObject(str).ToString());