CODEWITHSUNDEEP
asp.net-core.net-corevisual-studio-2019.net-core-3.0asp.net-core-3.0
Guilherme
Guilherme

Reputation: 5351

ASP.NET Core 3.0 not showing on Visual Studio 2019

I want to test the new Blazor server-side framework (aka Razor Components).

I installed Visual Studio 2019 RC, and then the .Net Core 3.0 preview 2, following this official tutorial.

After the install, I only see the ASP.NET Core 2.0 and the 2.1 on the "Create a new ASP.NET Core Web Application" page. The 3.0 is not showing up.

I started to mess around, trying to install other packages from this page, uninstalled and reinstalled Visual Studio 2019, updated to the .NET Core Preview 3, installed several times the x64 and x86 packages in different orders, copy/paste the .Net Core binaries to random folders and so on. Nothing works. The ASP.NET Core 3.0 does not show up.

Here is what my VS looks like when creating a project (the yellow message appeared latter after some messing around with the packages, so it is not the real problem):

enter image description here

Here is the output of the dotnet --list-sdks command:

enter image description here

EDIT

For some reason, I installed the Blazor VSIX package (the WebAssembly - not exactly what I want, but I installed it anyways) and now the ASP.NET Core 3.0 simply shows up. However, just for the blazor templates:

enter image description here

I don't understand. Is there anything obvious I'm missing?

Upvotes: 87

Views: 102770

Answers (18)

Ahmadreza Pourghodrat
Ahmadreza Pourghodrat

Reputation: 98

ASP.Net Core 3.0+ just runs on vs2019 version 16.7+. You need to go to help tab on your visual studio and check for updates and update it to the latest version

Upvotes: 2

LuisDev99
LuisDev99

Reputation: 1837

This answer is for the newest .NET Core version as of 10/11/2020, which is .NET Core 5.0

Specs: VS Version 16.8.0

Target Version of .Net Core: 5.0

You must have version 16.8.0 in order to have .Net Core 5.0

If you still have problems with Visual Studio not showing .Net Core 5.0 in Visual Studio version 16.8.0 (and assuming you downloaded the .NET Core 5.0 SDK for Visual Studio), well, apparently (and correct me if I'm wrong) it is now called just .Net 5.0, omitting the Core.

enter image description here

After selecting .NET 5.0, I was able to install other libraries which are currently version 5.0+ and dependent on .NET Core 5.0+

Is the new name intentional? Anyways, here some evidence of this working (I was able to install the newest version of Newtonsoft and Entity Framework for .Net Core):

enter image description here

Funny enough, when I try to create a new .Net Core project, the version shows up as expected:

enter image description here

I'm very sorry for my English!

[PS: I'm literally copying&pasting this answer, which I answered somewhere else, but given that, when you Google this issue, this stackoverflow question appears first. So thats why I'm reposting]

Upvotes: 0

user3069438
user3069438

Reputation: 681

I resolved it by installing

dotnet-sdk-3.1.403-win-x86.exe dotnet-sdk-3.1.403-win-x64.exe Because the visual studio was taking the SDK from "C:\Program Files (x86)\dotnet\sdk" once you install "dotnet-sdk-3.1.403-win-x86.exe" there will one folder under the above directory. then no need to restart your PC.

https://dotnet.microsoft.com/download/visual-studio-sdks?utm_source=getdotnetsdk&utm_medium=referral

Upvotes: 2

Paul Totzke
Paul Totzke

Reputation: 1440

If your solution uses global.json and sdk:version isn't compatible with the target framework, it won't let you select it or it disappears from Target framework drop-down in your project's properties. You will need to update it to something like this:

{
  "sdk": {
    "version": "3.1.0",
    "rollForward": "latestMinor"
  }
}

Upvotes: 2

Langy
Langy

Reputation: 335

I've had the same issue after installing .net core 3.1. This is how I resolved it.

  1. open powershell, type dotnet --version, it returns '2.2.300'
  2. go to 'programs and features', unistall .net core sdk 2.2.3.0
  3. run dotnet --version again, it returns '3.1.302' and in VS 2019 it shows '.net 3.1'

Upvotes: 0

zafar
zafar

Reputation: 2064

I noticed an interesting behavior. I had the latest version of VS with all the dependencies installed. But when I try to add a new project to the solution, the dialog does not show me the options beyond .Net Core 2.2

enter image description here

But When I create the new project from the startup page, the drop down does show the ASP.NET Core 3.1

So I was able to work around the issue by creating the new project from the startup page, then add the existing project to the solution.

enter image description here

Upvotes: 0

Sankara
Sankara

Reputation: 1479

I had the very same issue. I tried everything with no success

I already had only x64 version of .NET Core SDK

In addition i had to install x86 version too. That WORKED !!!

Upvotes: 2

SunsetQuest
SunsetQuest

Reputation: 8867

I had the same issue. Here is what worked for me.

  • First, download the latest .Net Core 3.0 SDK (see 1,2 below).

enter image description here

  • Next, Check for updates (4,5). (this is what helped me the most)

enter image description here

  • Next, Enable Preview SDK (5,6,7,8,9) and restart

enter image description here

  • Now, the .net core 3.0 option should show (11).

Upvotes: 14

Usman Farooq
Usman Farooq

Reputation: 1098

Here is what I did to show .NET Core 3.0 in VS2019

  1. Installed .NET Core 3.0 SDK (No Success)
  2. Restarted VS2019 after installing .NET Core 3.0 SDK (No Success)
  3. Updated VS2019 (Worked Perfectly)

Upvotes: 57

Jeremy Thompson
Jeremy Thompson

Reputation: 65712

It no longer works... again!

The SDK 3.0.100-preview8-013656 doesn't provide the ASP.Net Core 3.0 project template.

You have to uninstall it and install SDK 3.0.100-preview7-012821

https://dotnet.microsoft.com/download/dotnet-core/3.0

Upvotes: 13

Edgaras
Edgaras

Reputation: 154

I've encountered the same problem on a Mac and found a solution to this issue. On visual studio update tab (Visual Studio -> check for updates) there is a option to change channel to "Preview". Switch to Preview

After that you can download necessary updates and go using .net core 3.0

now there is option to change SDK to 3.0

Upvotes: 0

BehrouzMoslem
BehrouzMoslem

Reputation: 9713

I had this problem and solved it as follows:

STEP 1: Download .NET Core 3.0

STEP2: Enable the ability to consume preview SDKs by default, As shown below:

enter image description here

enter image description here

enter image description here

Upvotes: 2

carloss.nalda
carloss.nalda

Reputation: 11

I was not able to get .netcore 3.0 preview8 working on my Visual Studio Community Edition (version 16.2.3). I opted to uninstall .netcore 3.0 preview8 and I installed .netcore 3.0 preview7 instead. After insalling .netcore 3.0 preview7 In Visual Studio I checked use previews of the .NET Core SDK option that is in Tools -> Options -> Preview Features and I restarted it. That worked for me, but if someone have .netcore 3.0 preview8 already working, help will be appreciated it.

Upvotes: 0

Frazze
Frazze

Reputation: 271

Tried to get .NET Core 3 (preview 8 in my case) to work in the release version of Visual Studio 2019 but ASP.NET Core 3.0 refused to show up in the "Create new ASP.NET Core web application" dialog.

What eventually worked was to install the Preview version of Visual Studio 2019.

I could have saved a few hours and a lot of hair if I had taken the warning text ".NET Core 3.0 should be used with the latest previews of Visual Studio." (https://dotnet.microsoft.com/download/dotnet-core/3.0) more literally...

Upvotes: 7

Tono Nam
Tono Nam

Reputation: 36080

In my case is because I did not installed Visual Studio 2019 with that feature. So just create a new project and type .net core. Then click on Install more tools and features:

enter image description here

Then add the following feature:

enter image description here

Upvotes: 5

Navid Golforoushan
Navid Golforoushan

Reputation: 776

Note! (don't use it on your developer machine)

0- make sure you installed .net core 3 sdk. dotnet --list-sdks

1- make sure Tools -> Options that enables preview versions of the .NET Core SDK enabled.

2- uninstall all x86 version of .net core sdk from your machine.

3- restart visual studio and try to create a new project.

enter image description here

Upvotes: 0

Jimmy
Jimmy

Reputation: 28426

There is an option in Tools -> Options that enables preview versions of the .NET Core SDK. In the VS Preview shipping channel, it is on (by default, and not settable). In the VS Release channel, it defaults to off and you can opt-in.

"Use Previews of the .NET Core SDK" in the Tools->Options dialog

(Note: it's disabled in the screenshot because I have a Preview build installed.)

The reason for this is to allow you to customize whether a project using a released version of .NET Core (such as 2.1, the current LTS) will use tooling from the newer not-yet-release-quality SDK.

Prior to 16.1, this option was located on the Tools -> Options -> Projects and Solutions -> .NET Core page.

Upvotes: 136

Laurence Frost
Laurence Frost

Reputation: 2993

I have the same issue here after moving from Visual Studio 2019 Preview to Visual Studio 2019 RC.

This page seems to suggest that you need Preview to use .net Core 3.0 which is annoying.

https://dotnet.microsoft.com/download/dotnet-core/3.0

I looked up the difference between RC and Preview, and they pull builds from different channels (stable and preview).

The next thing I’m going to try is to go back to Preview to see if .Net Core 3.0 becomes visible again.

Upvotes: 8

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