## Request add WCF Duplex Channel support for Mono(for Xamarin.Android and Xamarin.IOS)

_Submitted by a community member on 2016-05-31 11:26 UTC_

System.ServiceModel doesn't exists System.ServiceMdoel.Duplex

And that will cause us can't use WCF Duplex Channel for 2 way communication.

That's a really big problem for us. I saw there is a lot of people already asked about Duplex Channel in Forms of Xamarin for few years, but it still not release.

I really hope we could use this feature, even .Net Core has it already which is starting way slow than Mono.

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_Xamarin Bugzilla comment 1 by a community member on 2016-05-31 11:35 UTC_

I'd confirm(already tested) .Net core WCF PR1 already had supported Duplex Channel: <https://github.com/dotnet/wcf/releases/tag/v1.0.0-rc1>

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_Xamarin Bugzilla comment 2 by a community member on 2016-06-03 03:29 UTC_

I download Mono Framework, and check, I'll found there is exists currently Xamarin telling me missing class like:

DuplexClientBase
BeginOperationDelegate
EndOperationDelegate

...etc

Why Xamarin Remove it?  Could you add it please?  or give us a solution for add it.

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_Xamarin Bugzilla comment 3 by a community member on 2016-06-03 03:32 UTC_

In mono also don't System.ServiceMdoel.Duplex,  but I found these class in System.ServiceModel

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_Xamarin Bugzilla comment 4 by a community member on 2016-06-20 16:07 UTC_

Where is the Xamarin developers?

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_Xamarin Bugzilla comment 5 by a community member on 2016-06-24 03:11 UTC_

Why don't you guys just copy it from Mono or .Net core?

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_Xamarin Bugzilla comment 6 by a community member on 2016-10-19 11:44 UTC_

Where are the people ??    Do you want us quit use WCF on the Server ?? If only WP support it, not Xamarin on the mobile,  what't the point of WCF future?

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_Xamarin Bugzilla comment 7 by a community member on 2016-10-26 19:09 UTC_

Even WCF for .NET Core 1.1 Preview1 has released now, What exactly the Xamarin developers doing for WCF????  When we could get the duplex channel? after WCF dead??

Who response for Class Libraries of Xamarin??
When we could see the source code if need help!

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_Xamarin Bugzilla comment 8 by a community member on 2017-08-08 18:36 UTC_

To anyone who want it: There is a discussion about it(with WCF and Xamarin team): <https://github.com/dotnet/wcf/issues/1688>

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_Reference: <https://bugzilla.xamarin.com/show_bug.cgi?id=41392>_