Support security mode TransportWithMessageCredential

[iamjasonp]

Message level security is not currently supported.
Attempting to use it will throw PlatformNotSupportedException

[fdsprod]

Currently cannot move our Windows 8.1 store application to Windows 10 because this is not implemented.

[oscar55]

Is there any progress related with this topic, Please i need it to work in it.

[ctolkien]

Just got burned by this one too.

[bc3tech]

getting burned by lack of wsHttpBinding here now as well.

[zhenlan]

This is currently still blocked by the lack of message security feature.

[havheg]

I need this too!

[ctolkien]

This has become more pressing for us with the announcement to ASP.NET Core 2 will not target NetStandard2. We need this in to move forward!

They are still going to target NetStandard2, this is however what is holding us to full framework.