System.Net.NetworkInformation.IPInterfaceProperties.DnsSuffix is not working as expected on Unix family OSes

Currently, System.Net.NetworkInformation.IPInterfaceProperties.DnsSuffix property returns only the search keyword's value from resolv.conf when there is exactly one entry on the line where search is present.

According to resolv.conf manual, there could be multiple entries for a given search keyword.

Following the documentation, you can also see that the domain keyword could be used as the first search domain when specified.

Additionally, when both of the keywords are specified, the last one will be used as the search domain:

The domain and search keywords are mutually exclusive. If more than one instance of these keywords is present, the last instance wins.

Returning multiple search domain entries (DNS suffixes) would break the backward compatibility. However, there should be a way for Unix family OSes to acquire this data somehow and the domain keyword should be used as well.