Step 1) First run dotnet --list-sdks from the command line (as in Grzegorz Smulko's answer). Take note of the greatest version number.
Step 2) Create a global.json file at the root of the solution with the exact version number from step 1. it needs to contain all the digits otherwise it wont work. This is the my version at the time of writing
Try running dotnet --list-sdks in the console.
According to the info on the pages that appear after downloading .NET Core SDKs from https://dotnet.microsoft.com/download, you need to have version v2.2.106 for VS2017 and v2.2.203 for VS2019.
With only the v2.2.203 installed projects didn't load for me in VS2019.
I had to install v2.2.105 too.
I need to install .net 4.7.2 for my specific project but I can't remove the .net 4.8.
You shouldn't need to install anything if you have .net 4.8 installed as it will run applications written for 4.7.2:
.NET Framework 4.8
The .NET Framework 4.8 is included with:
Windows 10 May 2019 Update
.NET Framework 4.8 can be used to run applications built for the ....
It can be best explained by the following description.
A multi-targeting pack, or MT pack, is a set of reference assemblies
that corresponds to a particular .NET Framework platform and version.
A reference assembly is a .NET Framework assembly that typically has
no method bodies and no internal or private APIs. Reference assemblies
contain just ...
Try to to install .NET Offline using DISM like in this example for .NET 3.5:
Type the following command:
“Dism /online /enable-feature /featurename:Netfx3 /source:D:\Sources\sxs” and then press enter. It take a while and when the process has finished, close the PowerShell Windows then go to check the exact windows features must be installed successfully.
I had this problem because I uninstalled some older dotnet SDKs. Not only would VS2019 no longer load dotnet core projects, but dotnet was no longer available on my path and so not available on the command line as simply dotnet.
After installing multiple older versions of dotnet and reparing my VS2019 install, I was finally able to fix it by adding C:\...
$ sudo apt-get install winetricks
$ winetricks dotnet40
To install using gui, you can try winetricks --gui, than choose install app, than cancel and in new window, choose install windows part or library. There are dot net dependencies.
To show installed things, you can winetricks list-installed.
I fixed it by installing the x86 version of the SDK.
It looks like each version of Visual Studio has it's own corresponding dotnet version that it builds on. This is due to msbuild requirements.
If you are a Visual Studio user, there are MSBuild version requirements so use only the .NET Core SDK supported for each Visual Studio version. If you use other ...
Both 4.5 and 4.51 are in-place upgrades, which means they replace the previous version (4 or 4.5). The files are overwritten and these framework versions do not have their own directory but are stored in 'v4.0.30319'
So your assumption was absolutely correct.
I had the same problem and solved it as follows:
I noticed that two recent Windows updates refer to .NET Framework 3.5. I uninstalled them both and then was able to install .NET Framework 3.5 from Control Panel.
I'm not sure if was necessary to uninstall both updates. They are KB2966826 and KB2966828.
I've installed .NET Framework 4.6.2 via the web installer, and
everything looked good. However, after I restarted and opened up
Visual Studio, it reported that 4.6.2 was not installed:
You need to download and install the .NET Framework 4.6.2 Developer Pack, which includes the .NET 4.6.2 Targeting Pack, after doing so you will be able to target that ...
None of the above worked for me. I noticed that I was having the issue on every type of project, even non-netcore. I was able to use the global.json and get that working. Then I noticed that I had a global.json in a directory further up which was referencing an alpha build of .net core. Deleted that file and bingo no further issue.
Make sure that there ...
Take a look at .NET Framework 3.5-Installationsfehler: 0x800F0906, 0x800F081F, 0x800F0907 :
I prefer the method 3: Use Windows installation media.
You can use the Windows installation media as the file source when you enable the .NET Framework 3.5 feature. To do this, follow these steps:
Insert the Windows installation media.
At an elevated command prompt,...
For a 64bit system you need to make a 32bit prefix and put the dotnet4.0 in it.
env WINEARCH=win32 WINEPREFIX=~/.wine32 winetricks dotnet40
\b means "word boundary" outside of character classes (also called character sets) and "backspace" inside character classes.
Here it means a word boundary:
Here it means a backspace
See this Microsoft reference: Character Escapes in Regular Expressions.
PERL regex has the same definition for \b.
You need your 2012/2012R2 ISO mounted or unpacked to a folder as the installation media for .net 3.5 is actually included on the DVD/ISO itself!
Next up, you can install by launching a command prompt (As Administrator) and running the following command:
DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:d:\sources\sxs
Download the Easy NGEN Script, run it as admin and select option 1 to do a full ngen run:
This takes alot of time and does all pending ngen operations. After this the ngen queue is empty and you shouldn't see the other tasks again.
I am stuck with .net 4.8.03761
That is your runtime. It can run .NET applications for 4.5 and up to .NET 4.8. See .NET Version compatibility for details. Support for .NET 2.0 through 3.5 and 4.0 is separate.
for my specific project
To develop for a .net target, you need an SDK for that particular target. You can have as many SKDs installed as you need.
Launching a process when the shutdown was initiated is a bad idea. At this stage the most likely outcome is to get back the error 1115 ERROR_SHUTDOWN_IN_PROGRESS.
A much better way is to install a service and register the service to receive shutdown notifications via RegisterServiceCtrlHandlerEx, see shutting down:
Service applications receive shutdown ...
See list below
"When the .NET Framework is installed as a part of the OS, it does not appear in the Programs and Features (or Add/Remove Programs) control panel. The following is a complete list of which version of the .NET Framework is included in which version of the OS:" That being said it can be turned on or off in the "Turn Windows features ...
Remove the Updates KB2966826 and KB2966828, reboot and try to activate .Net 3.5 again. Both are .Net 3.5 updates and they block the setup. Microsoft is aware of the issue and tries to fix it.
If you have any addition MUI packs installed you need the DVD of the additional language, copy the SxS folder of both DVDs to a local folder C:\sxs and point with the /...
You can download the Windows Server 2012 trial version to get an ISO with the required source files.
Mount the ISO with the inbox ISO mounting and run DISM to install .Net 3.5:
dism.exe /online /enable-feature /featurename:NetFX3 /Source:d:\sources\sxs /LimitAccess
If it fails, also try to run this Update before trying to activate .Net 3.5:
Update for ...
This answer combines information from multiple answers and also adds some extra steps not previously mentioned.
I managed to do it in the following way:
Download the ISO image for Windows Server 2012 R2 (Note! has to be R2) from https://www.microsoft.com/en-us/evalcenter/evaluate-windows-server-2012-r2 . It needs a windows live id registration and you need ...
After I installed .NET Framework 4.6, .NET Framework 4.6 Targeting Pack and .NET Framework 4.6 Language Packs it worked.
Microsoft .NET Framework 4.6 (Web Installer) for Windows Vista SP2, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2008 SP2 Windows Server 2008 R2 SP1, Windows Server 2012 and Windows Server 2012 R2
Microsoft .NET Framework 4.6 ...
It should be as simple as doing the following:
Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework (64-bit)
2b. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\wow6432node\Microsoft\.NETFramework (32-bit)
Create a new DWORD value
Set the name to OnlyUseLatestCLR and set value as 1 (decimal)
The short answer is no, you cant reliably defer ngen (and you shouldnt try), the only consistent/useful option i found was forcing it to run to completion and not leaving it lurk in the background.
If your trying to save some CPU cycles on battery (or in my case stop a server from running ngen after returning it into service following Windows updates) your ...
That's because you're looking in the wrong place.
Taken from the article “How to Determine which .NET Framework versions
are installed” at Microsoft Docs:
To find the installed .NET Framework versions manually (versions 4.5 and later):
On the Start menu, choose Run.
In the Open box, enter regedit.exe.
You must have administrative credentials ...