I have a program that I developed in C# and it is currently running on the Microsoft .NET Framework v4.0. I have upgraded to Visual Studio 2012 and that also installed Microsoft .NET Framework v4.5. Before when I had .NET Framework v4.0 installed, this how my program looked:
Now that I upgraded to .NET Framework v4.5, this is how it looks:
Notice the TreeView is now on the right side instead of the left? The 2 controls are each in seperate columns in a table which is in tool strip container. This problem is occurring on the latest/stable version of .NET Framework v4.5 (v4.0.30319.17929 or v4.5.50709 to be exact) which was released on August 15. I would like to know what is causing this and if there's a way to prevent this from happening (besides uninstalling .NET Framework v4.5)? Also, if this program is compiled with v4.0, why is v4.5 causing this problem?
Have you tried compiling it and running it under v4.0? Just because 4.5 is installed it doesn't mean 4.0 has been uninstalled.
In your solution explorer, right click on the project name and click Properties. Then in the Application tab, set the Target framework back to .NET Framework 4.
Then compile and run. If it's a .NET framework thing then it should all be back to normal. If it's still docked to the right, then the code has changed somehow.
Related
I need to create a very simple WinForms C# application that only requires .NET Framework 2.0 to execute properly (due to the fact that the customer isn't allowed to upgrade or connect his computer to the Internet).
On my computer I have Visual Studio (VS) 2005 and VS2019 installed.
I first tried VS2005 and created an empty WinForms application and sprinkled the project file with <TargetFrameworkVersion>v2.0</TargetFrameworkVersion> tags and compiled.
I then checked the .exe-file inside JetBrains dotPeek (according to a tip I found on How to find out which version of the .NET Framework an executable needs to run?) but it says it's .NET 3.5 application.
I then tried with VS2019, but I didn't have to manipulate the project file manually, instead I used the user-friendly dropdown for selecting target framework and set it to 2.0. However, the result was the same, the application became a .NET 3.5 application.
Does anybody know what I'm doing wrong?
The problem appears to be that JetBrains dotPeek is not reliable. I tried an .exe-file that JetBrains dotPeek reported was using .NET Framework 3.5, but I had no problems executing it on computer with only Windows 2000 and .NET Framework 2.0 installed. I agree with this answer How to find out which version of the .NET Framework an executable needs to run? that it's better to inspect the .exe-file in Notepad to determine which .NET version it requires.
I've got the following issue: I've got an SSIS package, in which I would need to use some features of the .Net Framework 4.6.
Whenever I set the Framework version in the project proprties, it doesn't complain, I can build the project without errors. However, as soon as I save the file and close the script, it reverts to .Net 4.5.
I've checked these two links, but the solution did not work for me:
SSIS Script Component - Changing target .net version keeps reverting
Cannot change Target Framework on Several Projects From v4.0 to V4.5 or 4.5.1
I've even installed the Target Framework Migration tool, which executes without errors, confirms that the framework was changed, but after closing and reopening the project it's back to v4.5 again.
Can anybody please help?
Thanks in advance.
Approved answer will work for SQL Server 2016 and older versions.
Starting with SQL Server 2017 framework version is based on SSIS project target server version:
SQL Server 2017 enforces .Net framework 4.5
SQL Server 2019 enforces .Net framework 4.7
Saving changes in script tasks/components is a three step process: Build/Save/Ok.
1.) In VSTA, change the .NET framework and then Build the solution.
2.) Save the solution and close VSTA.
3.) When you are back to the Script Transformation Editor, click OK. If you click cancel, all of your changes will be eliminated and you will have to redo everything.
In Rider IDE, I am trying to create a new solution:
But I'm unable to change the .NET Framework as the dropdown is disabled. How can I change the version? I have installed .NET Framework 3.5, 4.5, 4.6.
This is one of the way to change the build framework in Rider. It allows you to switch the MSBuild version explicitly by selecting MSBuild.dll.
When you have multiple .NET framework, you can change it here.
This example is for .NET core project.
In my system I installed latest .NET core RC after which Rider started complaining in older projects (when there were working fine prior to installation)
I had following versions
I selected the older version of MSBuild.dll and my project were back to normal.
in Rider IDE in solution explorer - right mouse click on the project,
in properties (left pane) select Application (should be selected by default)
in the right - change Target framework - click on ellipses, check your new framework
Save
Actually for now Rider contains the only one Web App Template - for net45.
We are going to add another one - for net4.6.1 (or 4.6.2) in 2018.1.
You can track status here: https://youtrack.jetbrains.com/issue/RIDER-10888
The main issue here - we can not just change target framework version, but change all referenced package versions and some template files...
#FaizanRabbani You should have installed suitable .NET Developer Pack to change this option. You can download it from https://www.microsoft.com/net/download/windows
i am working on a dotnet C# web application which was initially created with VS 2003. My goal is to upgrade this application to Dotnet 4.0 without changing any functionaltiy. The solution has 9 projects (1 web + 8 Library projects). The Web project refers the 8 libraries in DLLs. To start off, I created a New project in VS2010 and added the all the Project files from the existing source code. Every time i add a project file to my solution, i was prompted with the Converison wizard and i completed the conversion wizard succesfully and now the solution works fine. After the conversion, i noticed that Except the "Web" project, other projects are converted to Dotnet 2.0 but not 4.0. My application runs without error if i run it locally using VS2010. My questions are
Why the Class libaray project did not upgrade to 4.0? Currently the
Web project is shows up as Dotnet 4.0 and Libaray projects shows up
as Dotnet 2.0.
Can i deploy the application to IIS 7.0 with the
Dotnet runtime of 4.0? Will the Dlls created in version 2.0 work if my application
uses Dotnet 4.0 runtime version?
Please help...
If your'e migrating now, why not move directly to Visual Studio 2012, instead of 2010?
Anyway, what you can do is open the project properties in each of your projects, and change the target framework to the .NET framework 4.0.
Then if you get any compilation error you can probably easily solve it individually. This should be relatively easy if your projects are not too big.
As for your specific questions:
The automatic conversion would only change the format of the solution/projects to be compatible with the new version Visual Studio. It shouldn't change the target framework but you can change that yourself.
Yes, assemblies targeting .NET 2.0 can be loaded and used from assemblies targeting .NET 4.0.
1) Upgrading the solution/projects file only upgrades it's format so you can open it in VS 2010. It will usually leave the targeted .NET setting at the previous value. These are two seperate things. The wonderful thing about VS 2010 is it let's you target whatever version of .NET you desire, so no longer do you need multiple version of VS installed to support differnt .NET versions. It didn't change the targetted .NET version because it leaves it up to you. You can change it under the project settings and recompile your library projects to regenerate the DLLs
2) You will need an application pool for .NET 4. .NET is backwards compatible in that a .NET 2.0 app can run on a machine with .net 4 installed. However, the application pool for 2.0 applications must be separate from 4.0 apps. So it's just a matter of putting the app under the right app pool.
When I try to do it I get the error "The application requires .NET Framework 3.5 SP1." I have .NET 4.0, how do I install 3.5 SP1? Can I have both?
Feel free to install all versions of .Net. They will not interfere with each other!
For adding dependencies to your project I recommend NuGet. Really handy and makes the project clean by adding references into it instead of requiring additional installation packages.
.Net 4.0 projects are capable of using .Net 2.0, .Net 3.0 and .Net 3.5 libraries. But note that projects running under ".Net 4.0 Client Profile" can have problems doing this, and you only get a misleading error when attempting to run the project. From within Visual Studio everything seems right.
Just like Tedd Hansen says you can sure have as many .NET versions as you want in your computer for it creates no conflict at all. I take it you are just trying to install something. If that's the case then you can always use this link to download the bootstrapper that will determine the right 3.5 verison for you (x86 or x64) and download and install it.
If you are developing an application you can change the target framework of the project by going to the project properties page and, in the compile tab, click on the "Advanced Compile Options" button. There you'll be able to choose.
And, also as Tedd mentions, you should avoid targeting the "Client Profile" versions unless you specifically know that the subsets present therein are sufficient.
On my machine (Windows 7 Enterprise x86) I have installed .Net framework 4.0 and Enterprsie Library 5.0 without any problems. Maybe some other issue you're facing?
IAdapter,
I've answered this already. See my answer and the workaround in the comment dtd Feb 5, 2011.