RC1 --> RC2: Severe migrations issues

[gimlichael]

Dear sir or madam,

Since February this year, we have been developing our new solution in ASP.NET 5.
With the reason news and so forth - and a release to production being imminent - the migration from ASP.NET Core RC1 to RC2 gives us headaches.

We have followed various guides on the Internet, but every time we are a step closer, something else breaks.

Our solution (due to time-2-market) is build like this:

With the RC1 we had a target framework of dnx451 so we could use our legacy .NET 4 assemblies a long with the .NET 4 Framework assebmlies (mscorlib, etc.). We are running MVC Core 1 setup to serve both frontend UI with an associated frontend API. For the UI rendering, we use the REACT framework setup as a SPA.

With the RC2 release (which I understand will be close to RTM), we are forced to target netcoreapp1.0 which does not go well with the above mentioned assemblies. We have tried with the imports keyword for dnx451 but no change; I am unable to successfully let the two worlds play well together as I succeeded with RC1.

All development is happening under VIsual Studio 2015 with Update 2 on Windows 10 desktops. The server it will execute on, will for the time being, be a WIndows 2012R2 and IIS. Later, when early development is done, we will consider hosting on Unix .. but that is another story for another time.

Does anyone have a clue what to do?
I am sure the path we have chosen has been chosen by others as well, as we could not simple re-write all our assemblies over night.

And given the huge changes from Microsoft in terms of RC1 to RC2, I am somewhat glad that we did not put all eggs in the same basket.

Any help will be much appreciated .. I am guessing its not a viable road to keep using RC1 why we must find a way to make RC2 work with our mixed environments.

Last but not least; if a mixed environment is not possible (perse), is it then possible to tell classes in the solution what framework to use? I have seen the if dnx451 end if syntax, but I want the entire class to use netcoreapp1.0 and another class to use dnx451 for instance.

UPDATE

I have tried to be inspired/search knowledge through these "guides" (among many).

• https://wildermuth.com/2016/05/17/Converting-an-ASP-NET-Core-RC1-Project-to-RC2
• Notes about my own experience migrating from RC1 to RC2 #1381
• Running on full .NET framework with referenced assemblies aspnet/Mvc#4682

Thanks.

[smbecker]

Why not target net451?

[tugberkugurlu]

With the RC2 release (which I understand will be close to RTM), we are forced to target netcoreapp1.0 which does not go well with the above mentioned assemblies. We have tried with the imports keyword for dnx451 but no change; I am unable to successfully let the two worlds play well together as I succeeded with RC1.

I think you can target net451 which would mean the same. However, mono 4.2 doesn't completely work for the assemblies produced by dotnet CLI AFAIK (ref). So, you might need to upgrade to 4.4 from the the beta channel.

I am not able to get debugging working with VS Code under mono though (#1502).

[davidfowl]

With the RC2 release (which I understand will be close to RTM), we are forced to target netcoreapp1.0 which does not go well with the above mentioned assemblies. We have tried with the imports keyword for dnx451 but no change; I am unable to successfully let the two worlds play well together as I succeeded with RC1.

What @smbecker said. You're not forced to use netcoreapp1.0.

You can pick ASP.NET Core Web Application (.NET Framework)

[gimlichael]

Why not target net451?

We have tried to target net451 as well; same error.The reason we went for dnx451 was because thats what worked with the previous version (RC1).

[gimlichael]

As an update to this thread, it is worth mentioning that I have followed these "guides":

• https://wildermuth.com/2016/05/17/Converting-an-ASP-NET-Core-RC1-Project-to-RC2
• Notes about my own experience migrating from RC1 to RC2 #1381
• Running on full .NET framework with referenced assemblies aspnet/Mvc#4682

To name a few. I will update my question with these.

[gimlichael]

What @smbecker said. You're not forced to use netcoreapp1.0.

Maybe i was not clear enough; we are migrating the existing website from RC1 to RC2. However, I will try to create an empty website with the suggestion you have .. maybe that can put me on the right path.

[gimlichael]

I am not able to get debugging working with VS Code under mono though (#1502).

We are running in a Windows environment - thanks for the heads up. I will update my question.

[ThatRendle]

@gimlichael I have found it easier to create new applications (using VS2015) and dump all my source files into them than to manually convert an existing DNX project to .NET Core.

[gimlichael]

@gimlichael I have found it easier to create new applications (using VS2015) and dump all my source files into them than to manually convert an existing DNX project to .NET Core.

Hmm, that might be a way to go, although it does seems like a lot of work for what should have been a "simple" migration. Thanks for the suggestion, mate.

[SimonOrdo]

@gimlichael I have found it easier to create new applications (using VS2015) and dump all my source files into them than to manually convert an existing DNX project to .NET Core.

Frankly, that was the only way I was able to handle the migration in a reasonable time frame. There are just too many little odds and ends that were a nightmare to try and track down.

If you practiced decent separation of concerns this method will be much more reliable.

FYI, we also went from RC1 Framework to RC2 Framework (net451) and everything works now. There were still some code changes, but most of those were straight forward. It's all the configuration stuff that's a pain.

[gimlichael]

Frankly, that was the only way I was able to handle the migration in a reasonable time frame. There are just too many little odds and ends that were a nightmare to try and track down.

Thanks, this calms me down a little .. I will look into it tomorrow, and give my experience back to the community. I will see this as an opportunity to give it a make over in terms of following the SOLID principles. Some areas are in need of attention :-)

[gimlichael]

Okay, so I have now followed the sugestion from @SimonOrdo, and I have the first issue. We use REACT as the frontend framework setup as a SPA, hence this handles the routing. To my understanding, we need to reference "Microsoft.AspNetCore.SpaServices": "1.0.0-beta-000002" which relies on the .NETCoreApp 1.0. Any hints how to move along?

[davidfowl]

@SteveSandersonMS is working on fixing this

[gimlichael]

@SteveSandersonMS is working on fixing this

Thanks for the update, @davidfowl

[jkpindahbc]

@SimonOrdo, can you provide how you got the net451 dependencies resolved from RC1 to RC2? I have tried a multitude of different project.json configurations and nothing has worked. Thanks for any help.