Different behaviour in comparing IPAddress.IPv6Any to IPv6None to non .Net6 frameworks

[Maxyeah]

In .Net 6, comparing the System.Net.IPAddress.IPv6Any to IPAddress.IPv6None returns true.
In older versions of .Net Framework and .Net Core the result is false (IPv6Any != IPv6None).

Steps to reproduce:

Debug the following code in for example .Net Core 3.1 and .Net 6 to see the results.

            if(System.Net.IPAddress.IPv6Any == System.Net.IPAddress.IPv6None)
            {
                Console.WriteLine("IPv6Any == IPv6None");
            }
            else
            {
                Console.WriteLine("IPv6Any != IPv6None");
            }

Is this an intended change?

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[KalleOlaviNiemitalo]

Duplicate of #62072.

[antonfirsov]

@Maxyeah you should not use == (reference equality) when comparing IPAddress objects for equality. IPv6Any and IPv6None contain the same address value, so they are equal.

I wonder if you have any context. How did you encounter this? Why is it a problem?

[antonfirsov]

Closing as duplicate of #62072.