ASP.NET Core 3.0 System.Text.Json骆驼 case 序列化

在ASP.NET Core 3.0 Web API项目，如何指定System.Text.Json个序列化选项来将Pascal Case属性序列化/反序列化为Camel Case，反之亦然？

给定一个具有PASCAL case 属性的模型，例如:

public class Person
{
    public string Firstname { get; set; }
    public string Lastname { get; set; }
}

以及使用系统的代码.文本Json将Json字符串反序列化为Person类:

var json = "{\"firstname\":\"John\",\"lastname\":\"Smith\"}";
var person = JsonSerializer.Deserialize<Person>(json);

除非JsonPropertyName与每个属性一起使用，否则无法成功反序列化，例如:

public class Person
{
    [JsonPropertyName("firstname")]
    public string Firstname { get; set; }
    [JsonPropertyName("lastname")]
    public string Lastname { get; set; }
}

I tried the following in startup.cs, but it did not help in terms of still needing JsonPropertyName:

services.AddMvc().AddJsonOptions(options =>
{
    options.JsonSerializerOptions.DictionaryKeyPolicy = JsonNamingPolicy.CamelCase;
    options.JsonSerializerOptions.PropertyNamingPolicy = JsonNamingPolicy.CamelCase;
});

// also the following given it's a Web API project

services.AddControllers().AddJsonOptions(options => {
    options.JsonSerializerOptions.DictionaryKeyPolicy = JsonNamingPolicy.CamelCase;
    options.JsonSerializerOptions.PropertyNamingPolicy = JsonNamingPolicy.CamelCase;
        });

How can you set Camel Case serialize/deserialize in ASP.NET Core 3.0 using the new System.Text.Json namespace?

Thanks!