如何使用多态性将派生类序列化到JSON

// 基类
public class BaseClass
{
    public string CommonProperty { get; set; }

    public virtual string GetJsonString()
    {
        // 将基类的公共属性转化为JSON字段
        var json = new JObject();
        json["CommonProperty"] = CommonProperty;
        return json.ToString();
    }
}

// 派生类
public class DerivedClass : BaseClass
{
    public string DerivedProperty { get; set; }

    public override string GetJsonString()
    {
        // 将派生类的特定属性转化为JSON字段
        var json = JObject.Parse(base.GetJsonString());
        json["DerivedProperty"] = DerivedProperty;
        return json.ToString();
    }
}

// 序列化派生类到JSON
public static string SerializeDerivedClassToJson(BaseClass obj)
{
    return obj.GetJsonString();
}

// 示例用法
void Main()
{
    DerivedClass derivedObj = new DerivedClass();
    derivedObj.CommonProperty = "common";
    derivedObj.DerivedProperty = "derived";

    string json = SerializeDerivedClassToJson(derivedObj);
    Console.WriteLine(json);
}