I want to use the Task.Delay feature to set a delay in my program. I read and found out it's only in .NET Framework 4.5+. So I went ahead and downloaded .NET Framework 4.5. Well I still can't use this bit of code.
I'm not sure why. Any thoughts? I'm new to this so sorry if this is a dumb question. I'm using Visual Studios 2010 Express C#. Thank you for any help offered! Much appreciated!
Visual Studio 2010 Express can only target .NET 4. Download the latest edition and you should be set.
This could be a variety of things, but it sounds like you need to target .NET 4.5. Simply downloading .NET 4.5 doesn't tell your particular application that is should target that framework. You'll need to right-click on your solution and click properties, and then choose .NET Framework 4.5 as your Target Framework.
Edit: Asik beat me to it and was correct, I didn't even think about that. Once you download the latest version, you'll still need to change your target framework.
Related
I am creating a class library and have it targeting multiple frameworks. In this case .NetStandard 2.0 and .Net Framework 4.5. I want to write code specifically for .NET 4.5, but it's always greyed out and I get no intellisense. How to I tell the IDE I want to work on .NET 4.5?
I see you can change this, but it doesn't change how the IDE reacts (I know this is for running the app, but I thought I'd give it a try):
It's probably a stupid question, but I can't find anything online about targeting a specific framework in the IDE. Thank you.
bah. I found it. It's right under the tab of the CS file you are working on:
I knew it was a stupid question. But I wasted over an hour looking for this setting.
So i'm doing this project for my Computer Programming Class (That's due tomorrow) and i'm basically done with everything. Our school has Visual Studio 2010, and I have Visual Studio 2017. However, when I open it, it asks me to change to ".NET Framework 4.6.1" as my computer doesn't have ".Net Framework =v4.0". When I do, I can edit the program, but I can't debug/compile the program, as it outputs this error:
The reference assemblies for framework ".NETFramework,Version=v4.6.1" were not found. To resolve this, instal the SDK or Targeting Pack for this framework version... Therefore your assembly may not be correctly trageted for the framework you intend.
However, when I tried to go online and install the v4.6.1, the installer said that I had already had a version of 4.6.1 or a more updated version on my computer. I don't understand why this is, and if there's another question like this it would be helpful if you could link it as a reply. Thanks.
The answer to your problem is directly in the error message. "To resolve this, instal the SDK or Targeting Pack for this framework version."
My advice: Download and install .NET 4.0 SDK on your computer.
You can try one of these links to get the SDK:
https://www.microsoft.com/en-us/download/details.aspx?id=8279
https://www.microsoft.com/en-us/download/details.aspx?id=8442
You can also try the multi-targeting pack.
https://www.microsoft.com/en-us/download/details.aspx?id=29052
Also, checkout:
You can use the setup verification tool to diagnose your .Net Framework here: .Net Framework Setup Verification Tool or Alternative Download.
Also check the .NET Framework Setup Verification Tool User’s Guide
If you do find problems with your .Net Framework, you can use the Repair Tool to fix it, it is designed to fix issues specifically concerning the .Net Framework as well as updates: Microsoft .NET Framework Repair Tool
Hope this will be useful, good luck.
For VS2017 to support .NET 4.0, you need to make sure you've installed the correct component:
I'm using Microsoft Visual Studio 2010 and .NET4, but I would like to create application(Windows Form Application) that can be also run in .NET2. The reason is that I want it to be very easy to use and portable across many machines and not everybody has .NET4 installed.
Can I do it or do I need to install older version of Visual Studio? Is so what version is the best for most portable .NET app.
You can modify the target framework in the properties of the project:
You can select which .NET Framework version you want to target when you create a new project. If you want to change the framework of an existing project, do what Darin has illustrated.
Just modify the target framework by looking at the propeties of the solution you are working on.
I would highly advise you to target .NET 3.5 just based on the age of .NET 2.0.
.NET Framework 2.0 was attached to Visual Studio 2005.
By modifying the target framework is the way, but if you are thinking of portable maybe what you need is some kind of native code that works in every and/or most windows version.
Don't forget to delete redundant namespaces from your namespace list. For example LINQ...
Very blunt and to the point, but does anyone know how to convert a visual studio 2008 project to visual studio 2003, I'm meant to be delivering some stuff to a client and they only work in 2003.
Sorry someone makes a very good point, what language, C# is the answer.
I've done a bunch of searches on Google and tend to only come up with 2003->2008 and not visa versa, I would very much appreciate any help.
It cannot be done in the general case, as the VS2008 project may use .NET 3.5 features that don't exist in .NET 1.1 used in VS2003.
If you only have .NET 1.1 features in your VS2008 project, you could conceivably just copy the files, create a VS2003 project, then use "Add Existing Item" to get those items into the VS2003 project.
2008 has more settings than 2003. So if the project has some special settings your screwed.
Else create a new 2003 project and copy all the source files? (and use the same configuration)
It is going to be very difficult because VS2003 projects use .NET 1.1 and VS2008 use .NET 2.0, 3.0 or 3.5 (depending on the configuration of the project). The problem will be that there are features that have been to each version of the framework, and it is likely the code will use features that do not exist in .NET 1.1
There were converters to go from the old VS2003 project format to the MSBuild format used by 2005/2008, but I don't think any exist to go backward. Keep in mind that any non-trivial project in VS2008 might be challenging to move to VS2003 -- especially for an automated tool. For example, WinForms went through massive changes between VS2003 and VS2005.
Please correct me if I'm wrong, but doesn't Visual Studio 2003 only support .net 1.1? That means that if you have a .net 2.0 or 3.5 Application you have a problem. For C++ I guess it's a similar issue due to the old compiler.
Means: I believe it's borderline-impossible.
I'm currently using VS2005 Profesional and .NET 2.0, and since our project is rather large (25 projects in the solution), I'd like to try VS 2008, since its theoretically faster with larger projects.
Before doing such thing, i'd like to know if what I've read is true: can I use VS2008 in ".net 2.0" mode? I don't want my customers to install .net 3.0 or .3.5, I just want to install VS2008, open my solution and start working from there.
Is this possible?
P.D.: the solution is a c# Window Forms project.
Yes it's possible. In the project properties you can target different versions of the .Net Framework going back to .NET 2.0.
Upgrading to VS 2008 will upgrade your Solution file and you won't be able to go back to VS 2005 unless you have backed up your solution
yes, vs2008 can "target" a framework, but i think by default, if converting from vs2005 - vs2008 it just keeps it at framework 2.0
It is possible to have a 2.0 project in VS 2008. You would just target .NET Framework 2.0 under the project properties.
Your solution will have to be converted to a VS9 solution however.
Yes you can run 2.0 with VS2008. Be sure to select that when you convert, however. When converting a project, I mistakenly left in the ASP.NET 3.5 conversion, and then all new files contained references to Linq, so it was a little bit of a pain to switch back to 2.0 when I realized the mistake.
Yes, the feature that enables this is Visual Studio 2008 is called multi-targeting. See this link for more information. To use it you simply open the Properties for your Project, and select the Target Framework you want from the drop-down list on that page.
And bear in mind that all this stuff about the projects being compatible between 2005 and 2008 is NOT true for C/C++ projects.
I had absolutely no problems switching to VS2008. :) Multi-targeting worked without a hitch.