为什么不能使用static readonly object 属性？

Question

这是常量class:

 public static class Constants
    {
        public const string USER_ID = "conduent";
        public const string PASSWORD = "593becd1-02f6-46f0-bf34-25b393ad041b";
        public static readonly Uri BASE_URI = new Uri("https://staging.test-476b.com");
        public static readonly Uri GET_TOKEN_URI = new Uri("api/session");
        public static readonly Uri SEND_CASE_URI = new Uri("api/referral_request");
    }

这是用法

public class DanestreetHttp
    {

        private AuthToken authToken = null;

        private readonly HttpClient httpClient = new HttpClient()
        {
            BaseAddress = Constants.BASE_URI
        };
}

在屏幕截图上您可以看到错误，在我将 BaseAddress = Constants.BASE_URI 更改为 BaseAddress = new System.Uri("https://staging.test-476b.com") 后错误消失了。静态只读初始化有什么问题？

屏幕

PS。我目前的解决方案：BaseAddress = new Uri(Constants.BaseAddress)

Answer 1

问题是 Constants 中的 2 或 URI 无效，阻止此 class 初始化属性。如果您替换

它应该可以工作

public static readonly Uri GET_TOKEN_URI = new Uri("api/session");
public static readonly Uri SEND_CASE_URI = new Uri("api/referral_request");

和

public static readonly Uri GET_TOKEN_URI = new Uri("http://api/session");
public static readonly Uri SEND_CASE_URI = new Uri("http://api/referral_request");

（或 https）

Fiddle

为什么不能使用static readonly object 属性？

Why can not use static readonly object property?

c#

uri

initialization