C# 如何格式化json显示并获取响应

这是请求数据

[DataContract]
public class FooMessageType
{
    [DataMember(Name = "name")]
    public string Name { get; set; }
    [DataMember(Name = "password")]
    public string Password { get; set; }
    [DataMember(Name = "msg")]
    public string msg { get; set; }
}

这是响应数据

{ "name": "123","password": "123"}

我想要的是你的请求

{"msg":"error","name":"123","password":"123"}

及回应

{LoginRequest:{"username": "123","password":"123"}}

---

有人可以帮我创建类来显示这些数据并获得响应吗？我是创建wcf的新手

这是无效的JSON。所以你在问如何向类添加属性？你试过什么？你有什么问题吗？我不知道如何创建一个属性类创建一个常规类，然后创建一个该类型的属性。请给我举个例子，我的语言不好对不起

{LoginResponse:{"responseCode":"1","responseMessage":""
userDetails: {"firstname":"","lastname": ""}}}

{LoginRequest:{"username": "123","password":"123"}}

{LoginResponse:{"responseCode":"1","responseMessage":""
userDetails: {"firstname":"","lastname": ""}}}

class OuterClass { 
    public InnerClass MyProperty { get; set; }
}

class InnerClass { ... }