Add request header If-Unmodified-Since

[cmeeren]

https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/If-Unmodified-Since

[ivpadim]

@cmeeren the api allows you to set a custom header in your request. Have you tried?

[cmeeren]

Yes, that works. Ideally I'd like to set a DateTimeOffset and have the header value formatted automatically. Currently I have to use ToString("R") manually. It's not too bad, of course, but an API accepting DateTimeOffset directly would be better. :)