I am running Windows 8 and have both Visual Studio 2010 Ultimate w/sp1 and Visual Studio 2012 Ultimate and I am trying to create a Portable Class Library that supports .net 3.5 and greater.
When I first try to create a PCL I get a screen like this:
I noticed that .net 3.5 is not in the list so I clicked on "Install additional frameworks" and found a Targeting Pack for version 3.5. But when I download and run "dotnetfx35setup.exe" nothing happens. And when I go back into VS and try to create a new Portable Class Library, it lists the same target frameworks as before.
I have also turned on the Windows Features for .NET Framework 3.5 and am now out of ideas. Here is a screen shot in case I missed something else.
Thanks,
.NET Framework 3.5 didn't have a portable profile. Do you have this problem within Visual Studio 2010? I noticed once I installed Visual Studio 2012 on my own computer, the .NET Framework 3.5 was actually removed, likely because .NET 4.5 contains it.
Because you can still target to the .NET 3.5 if you want, just not a portable profile ( PCL ), which is easily proven by this article what you want is simply not supported.
As has been called out by others, .NET Framework 3.5 is not supported by portable library.
The link at the bottom of the page is a general landing page that lists all the targeting packs for all of our frameworks, not just the ones that work with portable, sorry for the confusion.
Visual Studio (either 2010 or 2012) allowed me to reference a simple Portable Class Library of Plain Old CLR Objects (POCOs) in another Class Library targeting .NET 3.5. This project works with Visual Studio 2015 as well.
It's possible that using some .NET 4.5 features in your PCL won't prevent it from compiling, but will make it incompatible for referencing from .NET 3.5.
Related
I'm working on an existing solution at work that was written in C# targeting .NET Framework 4 in Visual Studio 2019 for Windows. I'm attempting to open the project on my MacBook Pro (running Catalina 10.15.6 if that's relevant) in Visual Studio Mac 2019 Community (Version 8.7.7 Build 10) so I can keep working on this remotely.
I'm noticing that a usage of System.Windows.Media isn't being found. My understanding is that this relies on PresentationCore, which I believe is included in .NET Framework 4. Sure enough, in the project's References, PresentationCore has a red "x" next, with alt text telling me "Assembly not found for framework .NET Framework 4".
Is there any way to add this? Is this just something not supported in macOS? I'm happy to provide any additional information.
You are trying to run a WPF application, which targets .Net Framework (4), on MacOS.
MacOS doesn't support WPF, or any version of .Net Framework, as .Net Framework is Windows-dependent1.
Image source: https://visualstudio.microsoft.com/vs/mac/
.Net Core is supported - that's the cross-platform version of .Net, which works on Windows, Mac, and Linux.
You'll need to do a migration to make it work with Core. Of course, this still won't allow you use to run WPF on a Mac, you'd need to use another cross-platform supported UI framework.
1 Of course, Mono is the open-source version of .Net Framework that runs on Mac and Linux, so you can also try that as an option if you're feeling adventurous or can't migrate to Core.
See also: Can you install and run apps built on the .NET framework on a Mac?
Gunr2171 is correct; but you could also look at running a virtual box on your Mac for a windows environment then use VS Code.
For a VM I recommend
https://www.virtualbox.org/wiki/Mac%20OS%20X%20build%20instructions
Then Windows 10 OS:
https://www.microsoft.com/en-ca/software-download/windows10ISO
Just an idea if Mono doesn't work for you.
I have developed a program in visual studio 2012, my targeting framework was 4.5 and now i want it to be open in vs 2008.
I tried to edit cs file in notepad and edited it, but could not compile.
Is there any workaround?
Any help will be highly appreciated.
Visual Studio 2008 doesn't support the .NET 4.5 Framework. The maximum it supports is 3.5.
Similarly, the maximum VS 2010 supports is .NET 4.0.
You can try changing the target framework to 3.5 before opening it in VS2008, but if you're using anything from the newer frameworks, it won't compile.
Additionally, here's a Wikipedia article with the supported framework (and other information) for each Visual Studio release.
From ScottGu's blog: http://weblogs.asp.net/scottgu/archive/2009/08/27/multi-targeting-support-vs-2010-and-net-4-series.aspx
There isn't any way to target .NET 4 from VS08 and use new features.
Having said that, .NET4 is upwards comaptible with .NET 3.5 - so
applications you build targeting .NET 3.5 with VS08 should work fine
on top of .NET 4.
So in simple words you just can not!
Are you actually using features from the 4.5 framework? There's no IDE-supported way to do this, as other answerers have pointed out. What you can do is this:
Create a new project in Visual Studio 2008.
Add your files to it.
Go through and remove any references to .NET 4.5 and ensure it builds cleanly under .NET 2.0 or whatever VS2008-compatible framework you're targeting.
Rinse and repeat until you get a clean build.
Depending on what you're actually using in code, this may entail a lot of work or very little.
Does anybody know how I can run Awesomium.NET on .NET 3.5? Seems to only work on 4.0-4.5.1 right now.
According to this question, Awesomium 1.7 should be compatible with 3.5 by adding Awesomium.Mono to the project instead, but it seems like I'm not able to do that. When choosing 3.5 project in Visual Studio the Awesomium.Mono just disappears from the references list.
Well when I started using Awesomium web browser at version 1.7.0 the reference dll are builded using .net 4.0 version. You should try to look for an older version like 1.6.6 or 1.6.5 and check if they are builded using a older .net version. If you target your project to .net 4.0 you should not have any problem because at least windows XP with service pack 3 should have installed .net framework 4.0. But windows XP support has ended.
A quick solution (but not the best) is to target the project to the .net 4.0 and export all dll references to the build path. That should make no problems when deploying the app to your clients machine because the exe will reference to the build path.
Could you give me the reasons of why you are targeting .net 3.5 so I can understand a little more your issue with .net versions and try to think about another solution for you?
I am learning C# and have installed Visual Studio 2012 on a PC running Windows 7.
I can now browse to the C:\Windows\Microsoft.NET directory.
My first question is:
Does Visual Studio ship with the .NET directory, or does Visual Studio just access the directory that already exists on a computer running Windows 7?
My second related question is:
The highest numbered folder at the location C:\Windows\Microsoft.NET\Framework\ is v4.0.30319. This confuses me because the version number associated with Visual Studio 2012 in the table at https://en.wikipedia.org/wiki/.NET_Framework#History is 4.5.50709.17929.
So why do I not have a folder with that higher version number if I installed Visual Studio a couple of weeks ago?
Windows 7 comes with .NET 3.5 SP1. Visual Studio does not ship with .NET.. however, .NET ships with Visual Studio (obviously, so you can develop on it).
The version number didn't change between 4 and 4.5 .. I cannot remember the reason why (I think it had something to do with it being an in-place upgrade.. or something). This is why the folder version numbering is the same.
EDIT:
You can look here for a better explanation of the .NET 4/4.5 versioning and what the exact revision numbers mean: https://stackoverflow.com/a/12972517/1517578
Visual studio is just an IDE that requires the .NET framework. Lots of applications require the .NET framework so there's a chance that you could have had .NET installed before installing VS. Installing VS, however, will ensure you have the correct .NET runtime for your version.
.NET 4.5 is an in place replacement to the .NET 4.0 framework so the folder will still be called v4.0.... I guess this is a way to avoid problems with systems built on .NET 4.0
There is a good article here about .NET 4.0 and .NET 4.5
Visual Studio ships with the .NET directory and it also accesses the directory if that already exists. One can install .Net 4.5 separately too
The highest numbered folder v4.0.30319 is the version of the CLR and not the .Net Libraries. .Net v4.5 replaces v4.0 similar to the way v3.0, v3.5 and v3.5SP1 replace v2.0 still the CLR version remains v2.0.xxxxx. This is the reason why you don't have a folder with higher version number.
It comes with windows os. If you go to Turn Windows features on or off you will see the Microsoft .NET framework
What are the changes I need to make to a application built with .NET 2.0 /C# in order to use the C# 4.0 features . Recently I ran into a problem, when trying to add optional paramters in a product which was developed on .NET 2.0 / C# 2.0 .
Most 2.0 programs works without any changes on 4.0. It was only on 1.1 to 2.0 that there was a lot of incompatible changes.
One problem, that I ran into recently when upgrading a 3.5 project to 4.0 (Visual Studio 2008 to Visual Studio 2010), was that after upgrading to 4.0 I did not have a reference to System.Core and was unable to add it via Visual Studio instead displaying a message:
A reference to 'System.Core' could not be added. This component is already automatically referenced by the build system.
You will need to have a reference to System.Core if you want to use the var keyword and LINQ extension methods.
It can be manually added (or readded if removed). See the blog post System.Core in VS2010 Projects for details.
Maybe you migrated your Visual Studio solution to 2010, but you forgot to change the target framework to 4.0 in projects' properties.
Just go to properties in your solution projects (obviously, the migrated to Visual Studio 2010 solution) and change the target framework to 4.0.
That's all your C# code base will be using .NET Framework 4.0 and C# 4.0. I'm pretty sure you won't need to change your code, but, maybe, you'll find that some classes, methods, properties are now obsolete, but it'll compile anyway.
Comment out if you don't know how to do that.
In theory, C# 4 should be backwards compatible with C# 2.
In practice, I've done it several times with no problems, and I think the only obvious problem is if you have named some classes that are defined by the .net 4.0 framework.
You cannot use .NET 4.0 specific features in an application targeting .NET 2.0. You will need to migrate to .NET 4.0.
You can't easily convert form a higher version to a lower version.
You can easily convert form a lower version to a higher version.
C# in .NET 2.0 does not support optional parameters if I remember correctly.