We're working on the same OAuth support now. You can see it in PR #520.
Hopefully, it'll come in quite soon. I believe the support is already there in the Node SDK, and we're just waiting on some minor code review changes.
Circling back on this. Seems the PR has been merged late May. Are we releasing a new nuget package? @cleemullins
@sidecus we are working on releasing the nuget package shortly. Short term solution, build the package yourself. Longer term, daily builds are on the horizon.
Hi, is this released? i do not find in recent nuget? any documentation how to use it?
Hi, is this release in recent nuget? ny documentation how to use it?
the daily builds have it.
@EricDahlvang, can you post instructions (that we'll probably need to re-use often) for how to configure and consume the daily feed? As the daily feed has the right code, that should resolve this issue.
You can register a MyGet feed the same way you register any NuGet package source by using the Package Manager Settings dialog. You can find it under Tools > Library Package Manager > Package Manager Settings in the Visual Studio menu.

In the Options dialog, choose Package Sources then click the green + button. This will create a new package source entry. Fill in the Name field, and add the botbuilder.myget.org url as the Source ( https://botbuilder.myget.org/F/botbuilder-v4-dotnet-daily/api/v3/index.json )

Lastly, click Update then OK
This package source will now be available when managing packages for a solution or project:

Thanks @cleemullins and @EricDahlvang , is there any documentation i can refer on how to use OAuth Prompt. by using daily feed, i can refer to OAuth classes but it break other stuff.
@tusharvaja
Please try the latest Bot Builder on Nuget: https://www.nuget.org/packages/Microsoft.Bot.Builder/4.0.7
This documentation provides some guidance for implementing OAuth in a bot: https://docs.microsoft.com/en-us/azure/bot-service/bot-builder-tutorial-authentication?view=azure-bot-service-3.0&viewFallbackFrom=azure-bot-service-4.0
Some samples: https://github.com/Microsoft/BotBuilder-Samples/tree/master/samples/csharp_dotnetcore/18.bot-authentication and https://github.com/Microsoft/BotBuilder-Samples/tree/master/samples/csharp_dotnetcore/24.bot-authentication-msgraph
Most helpful comment
@sidecus we are working on releasing the nuget package shortly. Short term solution, build the package yourself. Longer term, daily builds are on the horizon.