Update HttpStatusCode enum (#26727)

* Update HttpStatusCode enum

* address feedback

Author: Caesar1995

src/System.Net.Primitives/ref/System.Net.Primitives.cs

@@ -126,52 +126,71 @@ protected EndPoint() { }
     public enum HttpStatusCode
     {
         Accepted = 202,
+        AlreadyReported = 208,
         Ambiguous = 300,
         BadGateway = 502,
         BadRequest = 400,
         Conflict = 409,
         Continue = 100,
         Created = 201,
+        EarlyHints = 103,
         ExpectationFailed = 417,
+        FailedDependency = 424,
         Forbidden = 403,
         Found = 302,
         GatewayTimeout = 504,
         Gone = 410,
         HttpVersionNotSupported = 505,
+        IMUsed = 226,
+        InsufficientStorage = 507,
         InternalServerError = 500,
         LengthRequired = 411,
+        Locked = 423,
+        LoopDetected = 508,
         MethodNotAllowed = 405,
+        MisdirectedRequest = 421,
         Moved = 301,
         MovedPermanently = 301,
         MultipleChoices = 300,
+        MultiStatus = 207,
+        NetworkAuthenticationRequired = 511,
         NoContent = 204,
         NonAuthoritativeInformation = 203,
         NotAcceptable = 406,
+        NotExtended = 510,
         NotFound = 404,
         NotImplemented = 501,
         NotModified = 304,
         OK = 200,
         PartialContent = 206,
         PaymentRequired = 402,
+        PermanentRedirect = 308,
         PreconditionFailed = 412,
+        PreconditionRequired = 428,
+        Processing = 102,
         ProxyAuthenticationRequired = 407,
         Redirect = 302,
         RedirectKeepVerb = 307,
         RedirectMethod = 303,
         RequestedRangeNotSatisfiable = 416,
         RequestEntityTooLarge = 413,
+        RequestHeaderFieldsTooLarge = 431,
         RequestTimeout = 408,
         RequestUriTooLong = 414,
         ResetContent = 205,
         SeeOther = 303,
         ServiceUnavailable = 503,
         SwitchingProtocols = 101,
         TemporaryRedirect = 307,
+        TooManyRequests = 429,
         Unauthorized = 401,
+        UnavailableForLegalReasons = 451,
+        UnprocessableEntity = 422,
         UnsupportedMediaType = 415,
         Unused = 306,
         UpgradeRequired = 426,
         UseProxy = 305,
+        VariantAlsoNegotiates = 506
     }
     public partial interface ICredentials
     {

src/System.Net.Primitives/src/System/Net/HttpStatusCode.cs

@@ -10,6 +10,8 @@ public enum HttpStatusCode
         // Informational 1xx
         Continue = 100,
         SwitchingProtocols = 101,
+        Processing = 102,
+        EarlyHints = 103,
 
         // Successful 2xx
         OK = 200,
@@ -19,6 +21,10 @@ public enum HttpStatusCode
         NoContent = 204,
         ResetContent = 205,
         PartialContent = 206,
+        MultiStatus = 207,
+        AlreadyReported = 208,
+
+        IMUsed = 226,
 
         // Redirection 3xx
         MultipleChoices = 300,
@@ -34,6 +40,7 @@ public enum HttpStatusCode
         Unused = 306,
         TemporaryRedirect = 307,
         RedirectKeepVerb = 307,
+        PermanentRedirect = 308,
 
         // Client Error 4xx
         BadRequest = 400,
@@ -54,15 +61,37 @@ public enum HttpStatusCode
         UnsupportedMediaType = 415,
         RequestedRangeNotSatisfiable = 416,
         ExpectationFailed = 417,
+        // From the discussion thread on #4382:
+        // "It would be a mistake to add it to .NET now. See golang/go#21326,
+        // nodejs/node#14644, requests/requests#4238 and aspnet/HttpAbstractions#915".
+        // ImATeapot = 418
+
+        MisdirectedRequest = 421,
+        UnprocessableEntity = 422,
+        Locked = 423,
+        FailedDependency = 424,
 
         UpgradeRequired = 426,
 
+        PreconditionRequired = 428,
+        TooManyRequests = 429,
+
+        RequestHeaderFieldsTooLarge = 431,
+
+        UnavailableForLegalReasons = 451,
+
         // Server Error 5xx
         InternalServerError = 500,
         NotImplemented = 501,
         BadGateway = 502,
         ServiceUnavailable = 503,
         GatewayTimeout = 504,
         HttpVersionNotSupported = 505,
+        VariantAlsoNegotiates = 506,
+        InsufficientStorage = 507,
+        LoopDetected = 508,
+
+        NotExtended = 510,
+        NetworkAuthenticationRequired = 511
     }
 }