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.NET SDK's Not Installing Correctly
(6 answers)
Closed 2 years ago.
Problem encountered on https://dotnet.microsoft.com/learn/dotnet/hello-world-tutorial/install Operating System: Windows Home x64
Version: 3.1.401
Visual Studio 2019
I am getting an issue with installing the .NET SDK, at first when I went into Visual Studio 2019 it said that I was missing the .NET runtime SDK so I installed it like it asked and restarted my computer. I then went on to Visual Studio 2019 again, and the same issue arose, I went into my command prompt and typed dotnet --list-sdks and it displayed no SDKs. I have all of the runtimes installed, but it says "No SDKs were found". I tried re-installing the SDKs but the same problem persists. I even went as far as to re-install IIS. Whenever I make a simple console app it opens it, but when I look in the solution explorer tab it says there are 0 projects and when I go to run it, it just says "attach" where "run" used to be, and the key shortcut doesn't work anymore either to run it.
Probably the Microsoft site is installing the x64 SDK version by default and is having a conflict with multiple versions on your computer. I'm saying this because of the dotnet --info result in your PrintScreen is showing just the x86 Runtimes.
Apparently you can't have both versions installed easily.
I recommend you to try uninstalling the x86 versions and stick with the x64. You can also check if you have both versions installed by consulting the installed programs on your computer.
Rick Strahl made a nice post about this problem in his blog: https://weblog.west-wind.com/posts/2019/Apr/20/Adventures-in-NET-SDK-Installation-SDKs-not-Showing-Up
There’s is .NET Framework and .NET Core those are two SDK‘s, you probably downloading the .NET Framework instead of the .NET Core you want.
Related
When I try to right click (in the Solution Explorer) and add the existing project to solution, I get the error:
The .NET Core SDK cannot be located. .NET Core debugging will not be enabled. Make sure the .NET Core SDK is installed and is on the path
I checked here (where they get the same error on VS Code) and tried repairing, installing, reinstalling Visual Studio and my .Net 6.0 and 7.0 SDKs. Made sure to install the SDKs even with VS not open, even after a fresh restart. Nothing worked. Plus, some of those solutions seemed specific to VS code, not VS Studio.
Not sure how relevant this detail is, but this my first attempt at installing Visual Studio on this computer.
The problem persisted regardless of project type (WPF and Console were attempted), .Net version (tried making .Net 6.0 and 7.0 apps, which are the 2 sdks I've got installed), and whether or not I indicated I wanted the project and solution in the same directory.
Those were my guesses, and nothing's worked.
Here's what it looks like when I create a new project:
Open visual studio installer and make sure you have installed .Net Framework Developer correctly.
Select .Net 6.0 on this page
Can you create a wpf .net 6 project according to this flow.
If it still doesn't work, please try the repair button in the installer.
The problem turned out to be that the SDKs weren't ordered correctly in the environment variables. C:\Program Files (x86)\dotnet was listed before C:\Program Files\dotnet. I found the solution here.
Not exactly a duplicate issue though, as issues were sort of different, but had the same fix.
i wanted to make pong with monogame using C# but VS told me otherwise...
Error: .NET Core 6.0 SDK is required to build this application, and is not installed.
Install the latest update to the .NET Core 6.0 SDK by visiting https://aka.ms/vs/mac/install-netcore6 (Pong)
but it is installed, i just don't understand
i even reinstalled it, but it didn't work
(Yeah, i know, installing .net on mac IS a stupid idea, but i didn't find a way to get monogame running with mono.)
You already know that i just wanted no errors but i got one
Just downloaded and installed SDK Net 7.0.100 and it broke existing applications and they won't load any more in VS 2022 or Rider.
Copied the follwing error:
error : SDK Resolver Failure: "The SDK resolver "Microsoft.DotNet.MSBuildSdkResolver"
failed while attempting to resolve the SDK "Microsoft.NET.Sdk". Exception: "Microsoft.NET.Sdk.WorkloadManifestReader.WorkloadManifestCompositionException: Workload definition 'wasm-tools' in manifest 'microsoft.net.workload.mono.toolchain.net7' [C:\Program Files\dotnet\sdk-manifests\7.0.100\microsoft.net.workload.mono.toolchain.net7\WorkloadManifest.json] conflicts with manifest 'microsoft.net.workload.mono.toolchain' [C:\Program Files\dotnet\sdk-manifests\7.0.100\microsoft.net.workload.mono.toolchain\WorkloadManifest.json]
at Microsoft.NET.Sdk.WorkloadManifestReader.WorkloadResolver.ComposeWorkloadManifests()
at Microsoft.NET.Sdk.WorkloadManifestReader.WorkloadResolver.Create(IWorkloadManifestProvider manifestProvider, String dotnetRootPath, String sdkVersion, String userProfileDir)
at Microsoft.NET.Sdk.WorkloadMSBuildSdkResolver.CachingWorkloadResolver.Resolve(String sdkReferenceName, String dotnetRootPath, String sdkVersion, String userProfileDir)
at Microsoft.DotNet.MSBuildSdkResolver.DotNetMSBuildSdkResolver.Resolve(SdkReference sdkReference, SdkResolverContext context, SdkResultFactory factory)
at Microsoft.Build.BackEnd.SdkResolution.SdkResolverService.TryResolveSdkUsingSpecifiedResolvers(IList`1 resolvers, Int32 submissionId, SdkReference
I experienced a similar problem.
I uninstalled the 7.0.100-preview.5.22307.18 sdk using add remove programs and then changed the TargetFramework in the project file to use 7.0 and then I was able to load the projects.
EDIT: This is officially documented in the release notes known issues.
I'm from the .NET SDK team. Sorry you're going through this. I would love to comment on the other answers, but I don't have the reputation to do so.
What Tim Farley suggested is an officially endorsed workaround; uninstalling any preview 7 SDKs with add/remove programs should resolve the problem.
As for why this happened and why uninstalling preview SDKs will fix the issue, there's a bit of an explanation I put here: https://github.com/dotnet/sdk/issues/28947#issuecomment-1307987337.
TLDR: Some workloads were renamed in the middle of .NET 7 preview development to support things like multitargeting, and when you download the new RTM old preview files interfere can with it.
Updating the TargetFramework is recommended but it's unrelated to this issue. Usually breaking changes for each .NET version and related new features are gated behind your TargetFramework (TFM), so things don't break until you update the TFM, not when you update the SDK. (Unfortunately, not true in this case.)
In response to whether this will happen again or not when upgrading to .NET 8, per Scott: with how workloads are currently structured this issue would happen again. We're discussing how to make changes to prevent this from happening again though as it's not ideal. We're also considering adding dotnet workload clean or something to repair this for you. Communicating with us on the SDK GH thread, or with me here, is a good way to send us feedback about this.
Repairing Visual Studio installation did not help me. Neither did uninstalling .net 7 faulty workload ('wasm-tools'), since any attempt to uninstall or repair it ended up in the same error message.
Being ran out of conventional options to address the issue, I just went ahead and physically deleted the conflicting folder: microsoft.net.workload.mono.toolchain, leaving second one microsoft.net.workload.mono.toolchain.net7 intact. It luckily solved problems on my machine. From now on I'll be more cautious on installing Ms RC packages
I had a similar problem, even on new .Net projects. I uninstalled the 7.0.100-preview.2.22153.17 SDK using add remove programs and I was able to create a new project again. I am now left with only one .Net 7.0 SDK (from Visual Studio) as shown below.
Uninstall Microsoft .Net SDK 7.0 preview
I had the same issue as above except on my M1 mac. I followed the following guide and manually removed all the directories for all the .net 7 runtimes and sdks. Then reinstalled .net7 and all seems to be well now. rider can open my projects and the dotnet cli no longer complains
Not sure if a similar scorched earth approach will work for the windows folks.
https://devkimchi.com/2021/11/24/removing-dotnet-sdks-from-macos-manually/
I had the same issue, except that no preview version of .NET 7 was currently installed on my system, but the preview artifacts were still in the C:\Program Files\dotnet\sdk-manifests\7.0.100 directory. My solution was to uninstall the stable version of .NET 7 (not the version from VS 2022), then install and uninstall 7.0.100-preview.7. Doing so resulted in the preview artifacts being removed and this error being resolved.
I had same problem, but i think the problem because M1 mac
Had the same problem. Deleted manually installed net 7 sdks in windows uninstaller.
I found out that I needed to rm -rf **/obj
(delete all folders named obj) in the solution root folder after upgrading from net 6 to net 7, in addition to dotnet clean
I've installed the preview of .NetCore 3.0 and tried to run the blazor template Blazor (ASP.NET Core hosted) in Visual Studio 2019:
The error that occured, was the following:
NETSDK1045 The current .NET SDK does not support .NET Core 3.0 as a target. Either target .NET Core 2.2 or lower, or use a .NET SDK version that supports .NET Core 3.0.
During these days I had to overcome this issue on a number of different development machines/containers: eventually, I found no less than 6 different reasons that could cause this kind of error:
Missing .NET Core 3 SDK (x86 or x64)
.NET Core SDK preview support not enabled in VS2019
VS2017 instead of VS2019
Wrong SDK path in PATH environment variable(s)
Wrong SDK path in MSBuildSDKsPath environment variable(s)
Wrong SDK version in the project's global.json file
The workarounds for those scenarios are pretty easy to understand, you basically have to either install the proper SDK or remove the "offending" SDK reference(s). However, I did my best to document them all in this post on my blog.
Following this comment, I managed to resolve the problem by installing the x86 version of the .NET Core 3.0 additionally to the x64 version. The build worked after restarting Visual Studio (2019).
for me the solution was removing a path variable MSBuildSDKsPath - Because of exploring preview sdks's i at some point declared that variable to fix another sdk bug - seems like that force sets the used version. So in my case it was set to 3.0.100 and resulted in errors when attempting to use 3.1.300
I got the same error and resolve it with checking the option "Use previews of the .NET Core SDK (requires restart)".
Open Tools > Options and try looking at "Preview Features" or ".Net Core" depending of your Visual Studio version.
Watch out of VS updates, they can disable it.
This is a very hacky-feeling solution but at least it worked. Let's say you've installed the SDK for 3.0.100-rc1-014190. It shows up in dotnet --list-sdks as expected but still doesn't seem to be detected by Visual Studio, and you get the same NETSDK1405 error when trying to build or test anything from the dotnet CLI.
Look in your dotnet SDK install directory (usually C:\Program Files\dotnet\sdk). You should see your preview SDK in there. Either create a copy or rename the existing folder to remove the preview version suffix. For example 3.0.100-rc1-014190 would instead become 3.0.100, like so:
Doing this made .Net Core 3 preview support finally work in VS2019 Preview 4 and the dotnet CLI for me.
For me it was as simple as enabling the preview in Visual Studio 2019. Unfortunately most posts that show how to do this are I believe out of date. I finally came across this stack overflow post How to enable .NET Core 3 preview SDK in VS2019? They moved the check box and it was not on by default for me.
This was a frustrating issue to track down and after doing all of the updates to VS and still not being able to install I tracked it down to an environment variable. Try removing MSBuildSDKsPath and see if that fixes your issue.
I have installed VS2019 on the E: drive of my machine rather than the smaller c: boot drive. I had it installed before I Wiped the machine on the c: drive and it took up WAY to much space. Now It gives me this error message AND WILL NOT allow me to pick any targeting .NET Framework on C# WFA before 4. I have NO Idea what to do, Ive followed the advice and went to the website listed and manually downloaded the .NET Core SDK for 2.0 and installed it, then tried to repair it, and it JUST KEEPS SAYING ITS NOT INSTALLED, the project needs .net 2.0 to work. Am I gonna have to wipe the WHOLE computer again and take up ALL the space on my boot drive to get this damn thing to work? I just don't understand, It does this on enterprise & community, how the hell can Microsoft NOT excpect an ENTERPRISE to install VS 2019 ON another drive then the boot drive, ESPECIALLY WHEN ALL THE TOOLS YOU NEED ARE GARGANTUAN.
IVE TRIED EVERYTHING THE ERROR MESSAGE SAYS. there are 2 options it gives to load the project, 1. DOWNLOAD the sdk manually for .NET FRAMEWORK 2.0 WHICH IVE INSTALLED AND REPAIRED, 2. CHANGE THE PROJECT TO .NET 4.0, WHICH I CANNOT DO. or the worst option JUST CLOSE THE SOLUTION
I want to be clear that I Have another machine that this project pulls up perfectly with VS 2019 and I know people are gonna jump to the Microsoft doesn't support something that old bandwagon. It gives me the option to target .NET Framework 2.0 on the other machine RIGHT NOW, and did on this one for VS 2019 Community AND ENTERPRISE BEFORE INSTALLING ON AN OTHER THAN BOOT DRIVE, so wheteher they TECHNICALLY SUPPORT IT IN ALL THE DOCUMENTATION IS A VOID ARGUMENT, it worked perfectly before on this exact machine, and does an another one with VS 2019, if it was a support issue I seriously doub MS would give an error messae saying to install .net 2.0, I knew installing CORE probably wouldn't work, but that's the websit it sent me to.The point is they DID just 2 days ago, Microsoft randomly stops supporting legacy features like that on an ENTE#RPRISE PRODUCT with NO warning after release? Now I see why a lot of c++ people DESPISE VS.
If something in your project absolutely requires the .NET framework 2.0, try installing it from https://www.microsoft.com/en-us/download/details.aspx?id=19988 (this is NOT .NET Core)
Visual Studio 2019 doesn’t support older .NET Framework versions than 3.5, see documentation. If you really need .NET 2.0 you need to install an older Visual Studio that has support for that version.
.NET Core is completely different thing than .NET Framework 2.0 so installing that doesn’t help.
This has nothing to do with where you install applications.
Also note that support for 2.0 has ended a decade ago so if this project is needed it would be highly recommended to update it into a newer version. There usually aren’t many reasons why this cannot be done.
Fixed it for anyone that EVER has this problem again, you've got to search through some deprecated websties but im absolutely sure If you've made it this far you can figure out how to install the .net faramework 2.0 sdk if you just search hard enough lol