RestSharp 108含保留字的JSON映射C#类问题及解决方法

六年前基于低于108版本的RestSharp实现了JSON到C#类的映射，用于处理包含空格和保留字的字段。升级到RestSharp 108版本后，出现以下错误：

无法从程序集'RestSharp, Version=108.0.1.0, Culture=neutral, PublicKeyToken=598062e77f915f75'加载类型'RestSharp.Deserializers.DeserializeAsAttribute'

相关代码与数据 #

JSON载荷 #

{
    "agentType": "Sub Broker",
    "agentCode": "FWM",
    "agentName": "FWM",
    "default": "Y"
}

旧版C#类（依赖RestSharp的DeserializeAsAttribute） #

public class AgentInformation
{
    public string agentType { get; set; }
    public string agentCode { get; set; }
    public string agentName { get; set; }
    [DeserializeAs(Name = "default")]
    public string isDefault { get; set; }
}

升级后仍用旧写法的调用代码（触发报错） #

try
{
    var client = new RestClient("https://xxxx.io/v3/xxxxxxx");
    var request = new RestRequest();
    request.OnBeforeDeserialization = resp => { resp.ContentType = "application/json"; }; 
    var response = client.Get<AgentInformation>(request);
    var data = response;
    Console.ReadLine();
}
catch (Exception er)
{
    throw er;
}

解决方案 #

RestSharp 108移除了DeserializeAsAttribute，改用System.Text.Json的JsonPropertyName特性实现字段映射，具体调整如下：

修改后的C#类 #

public class AgentInformation
{
    public string agentType { get; set; }
    public string agentCode { get; set; }
    public string agentName { get; set; }
    [JsonPropertyName("default")]
    public string isDefault { get; set; }
}

调整后的API调用代码 #

try
{
    var client = new RestClient("https://xxx.xxx.io/v3/xxxx-xxx-xxxx-xxx-xxxxx");
    var request = new RestRequest();
    request.OnBeforeDeserialization = resp => { resp.ContentType = "application/json"; }; 
    var response = await client.GetAsync(request);
    var options = new JsonSerializerOptions(JsonSerializerDefaults.Web);
    var data = JsonSerializer.Deserialize<Model.AgentInformation>(response.Content, options);

    Console.WriteLine(data.isDefault);
}
catch (Exception er)
{
    throw er;
}

内容的提问来源于stack exchange，提问作者hiFI