We just had a pen test completed and one of my servers was hit with an out of date version of .NET core. Now, in the old days of .NET Framework, I would just install the newest version on the server and call it a day. However, I'm not sure about .NET Core and what would happen if I slap v6 on there and what it will do to my existing applications. Will I be ok or do we need to update all of the applications that use that older version of .NET core when we update the version on the server?
In my opinion, you should update the old .net core version to newest version.
As far as I know for LTS .net core, MSFT will update it for each version.
Like 3.1, 5.0, 6.0, you could follow this link version to download the newest version.
But if your application is built by 2.1 and it is out of date, if you remove the 2.1 runtime, it may caused some issue.
Related
In my school they use VS 2019. I installed the same because that was what was available at the time (community version for me, I think the same for my school).
I had a couple of issues with VS2019 so I uninstalled everything and installed 2022 version instead. I then began to use this for the last 2 weeks but when I tried to open my old files, I couldn't.
I did install framework 3.1 again and the code will enter runtime successfully, but I still can't see the code that I wrote. I don't want to re-install VS2019 because it kept on giving me issues with intellisense which I just couldn't fix.
Is there any way I will be able to open my old 2019 files in 2022? Also, will 2019 be able to open 2022 files?
The generic answer to this is mostly yes but maybe no depending on your specifics. That's not a helpful sentence, so let me explain.
For the most part, Visual Studio solutions and projects are cross-compatible1. This means that if you have a project from one version, you can usually open it in another version without issue. The major caveat to this is the range of frameworks supported by each VS version may be different. VS will often be able to open the project, but might not be able to build and run it.
(Because you tagged this with vb.net, I'm limiting this to .NET versions. The same concepts may apply for other platforms.)
For example, VS2019 supports:
.NET version 5 (Visual Studio 16.8 or later)
.NET Framework versions 4.8, 4.7.2, 4.7.1, 4.7, 4.6.2, 4.6.1, 4.6, 4.5.2, 4.5.1, 4.5, and 4.0
.NET Core 3.1, 3.0, 2.2, 2.1, and 1.1.
And VS2022 supports:
.NET Framework versions 4.8, 4.7.2, 4.7.1, 4.7, and 4.6.2
.NET Core 6.0 Preview, 5.0, 3.1, 3.0, 2.2, and 2.1.
Note how VS2022:
DOES NOT support .NET Framework versions 4.0-4.6.1, or .NET Core 1.1
DOES support .NET (Core) 6.0 - which VS2019 does not
It is reasonable to expect that the next version of VS will stop supporting some versions while it adds support for new ones again, so this compatibility range will change with each VS release.
1: Each different type of project requires a Project System to support it. Occasionally, these may be dropped out of support like with the frameworks described above, but with the more severe consequence that VS will not be able to open the project at all. Some examples over time: Silverlight and Windows Phone projects, Setup projects, DNX (early .NET Core) projects, etc.
These instructions https://www.microsoft.com/net/core#windows indicate that all previous version of .NET Core should be removed from Windows via the Add/Remove Programs before installing .NET Core SDK 1.0 RC2 on Windows.
However after running the uninstall from Add/Remove Programs in Windows 7 and installing .NET Core SDK I see that my /Program Files/DNX/ folder still exits.
This makes me wonder if I should delete it to clean up the system. But perhaps it's needed when working with older projects that were created with RC1 under DNX.
I'd like to know if it's ok to delete the dnx folder and it associated runtimes?
It's up to you. If you leave them there nothing bad will happen because the executables have different names (dnx/dotnet).
You can have dnx and dotnet side by side.
You should not delete this folders if you have old (DNX-based) projects that you still want to run. Otherwise, you will need to reinstall the dnx runtimes again to work with your old (RC1) apps.
Your new (RC2, dotnet cli) projects will known nothing about this old dnx-based folder and will ignore it completely.
Microsoft advise you to remove any old version of .Net Core. The DNX was the runtime and toolset used to build .Net Core and .Net Core apps as per Microsoft. It was consisted of DNVM, DNX and DNU.
With the .Net Core CLI all above (DNVM, DNX and DNU) are part of a single toolset.
You'll may find some issues when removing DNX, also when migrating a existing solution on any beta/rc version of clr or coreclr which were (dnxcore50 or dnx46) and others deprecated now.
NOTE: when uninstalling MS ASP.NET 5 RC1 Update 1 (old version), you
may have issues on your VS 2015 regarding to some projects templates,
existing MVC or WebAPI projects may not load.
I'd suggest you to migrate to .Net Core 1.0 as I did in my side, it was a little pain but you won't go anywhere with a project target to a deprecated version.
You can follow these links to migrate your app:
1) https://chsakell.com/2016/05/21/migrating-asp-net-5-rc1-apps-to-asp-net-core/
2) http://dotnet.github.io/docs/core-concepts/dnx-migration.html
I am working on a project that is currently using an early pre-release .net 4.0 version on HttpClient in System.Web.Http namespace. We know that this version causes conflicts with .net 4.5 version.
We are thinking of upgrading to Visual Studio 2012 and we know that this is going to install .net 4.5 (which we dont currently use). My question(s) is, how drastically different are the two version of the HttpClient class? Or, would the use of the latest .net 4.0 version of HttpClient be enough to get us to a stage where we could install .net 4.5 and not have any conflicts?
Cheers
NCBL
The two versions are identical from an API perspective and 4.5 is backwards compatible with 4.0 from a functionality perspective. The 4.5 version does support a couple new features on WebRequestHandler (ContinueTimeout & ServerCertificateValidationCallback) so avoid those.
You shouldn't run into any conflicts when using this library and running on 4.5. The 4.5 version has the same name as the 4.0 version and the framework will unify to the inbox version.
I have a documentum 5.3 SP3 content server installed on a machine And one .net application is also installed on the same machine
current .NET version is 2.0
and i want to install the .NET version 4.0 on that machine.
So, I want to know if that install will in any way interfere with
Documentum?
You can install different versions of .Net frameworks on a machine and everything should work fine. The documentum content server does not need .Net framework installed. So I suppose you are using something 3rd party/homebrew component, maybe you should ask the developers of that stuff.
You can install all major versions of .Net concurrently, so there should be no issue. This is completely independent of Documentum.
I've got an old Windows 2003 server running IIS 6, and I chose .net 4.5 for my latest web app. Problem is I can't get it to run on the server...
.NET 4.0 framework is installed. I've run aspnet_regiis and deployed the website. I gave it it's own application pool. But I'm getting the following error:
The 'targetFramework' attribute in the <compilation> element of the Web.config
file is used only to target version 4.0 and later of the .NET Framework (for
example, '<compilation targetFramework="4.0">'). The 'targetFramework' attribute
currently references a version that is later than the installed version of the
.NET Framework. Specify a valid target version of the .NET Framework, or install
the required version of the .NET Framework.
I saw the requirements for .NET 4.5 as requiring Windows Server 2008 or later, but I'm seeing lots of posts with people just needing to configure the routing for MVC4 so it seems like this should be possible.
So any ideas what I need to do in order for this to work?
EDIT: The strange thing is we are using an ASP.NET Web API site that works just fine... but that should require .net 4.5...
.Net 4.5 cannot be installed on Windows Server 2003.
Instead, you should use MVC 4.0 on .Net 4.0, which will work fine.