OmniSharp Error: Found dotnet version 5.0.201. Minimum required version is 6.0.100

user_18238527 0
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I use VS Code as my IDE. Today I saw in my C# files that I could no longer use things like "Go To Definition/Implementations" or hover over anything to get the path/type etc.

I found my Omnisharp console and saw they updated last night and there is an error:

Error: Found dotnet version 5.0.201. Minimum required version is 6.0.100.

I can't upgrade my dotnet because 6.0 is not compatible with the runtime in my project and on Mac M1, there are a lot of issues running multiple dotnet instances..

I guess its a bit of a rock and a hard place, anyone know how I can get around this issue?

omnisharp
5 Answers

This is a recent update to Omnisharp, which is used by the VS Code C# extension. Add this to your settings and restart the editor.

    "omnisharp.useModernNet": false,
    "omnisharp.path": "",

Also if you don't have Visual Studio installed you will likely need to install the Build Tools to get MSBuild: enter image description here

My understanding of the rationale behind this change is an optimization for modern vanilla c# projects over those using older versions (ie Unity). More info in this issue.

user_25560340

Revert your Omnisharp to previous version

enter image description here

user_13553220

Update 1.25.0 introduces newer OmniSharp build for .NET 6 which does not support non SDK style .NET projects but results in performance improvements. Fortunately you can disable this in the settings:

C# Extension Settings

Also, the C# extension no longer ships with an included Mono & MSBuild Tools. Download them here: Build Tools Worst case, you can revert to an older extension version.

user_134320040
user_148256200

I haved similar problem and i fixed like this:

Im using win7 and i have VS 2019 IDE which not supporting dotnet 6 cuz of that vs_installer not installing dotnet6 sdk, in result i cant use c# extension v1.25.0 in vs code, because omnisharp needs net6. I installed net 6 sdk to my win7 and problem is solved, now i can use c# extension v1.25.0 in vs code.

user_132497410
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