Why does Microsoft.AspNetCore.Http.StatusCodes not include 422 Unprocessable Entity?

Question

Microsoft.AspNetCore.Http.StatusCodes contains lots of status code constants useful for returning from a controller and can for example be used like this in a controller:

return StatusCode(StatusCodes.Status201Created);

But oddly the StatusCodes class contains no value for 422 Unprocessable Entity, at least not in Asp.Net Core 1.0.1. Why doesn't it contain StatusCodes.Status422UnprocessableEntity ?

Has this http status code been depreciated by some spec I am unaware of? Or is there some other reason that 422 Unprocessable Entity wasn't included?

Answer 1

Actually it is included in Microsoft.AspNetCore.Http.StatusCodes.

Please find current list in: StatusCodes.cs

HTTP Status Code 422 is WebDAV specific (RFC 4918) and it was added to Microsoft.AspNetCore.Http.StatusCodes a little bit later.

(See details of Added HTTP Status codes #654 pull request)

But it was a few months ago, so the question is what version of ASP.NET Core are you using?

Update:

As Ron C noticed - this status code is included in v1.1 (and not available in v1.0.1).