Error to loading Assembly-CSharp.csproj

Scripting C# & .NET
1

My OmniSharp cannot open Assembly-CSharp.csproj

[info]: OmniSharp.Stdio.Host
        Starting OmniSharp on ubuntu 19.10 (x64)
[info]: OmniSharp.Services.DotNetCliService
        DotNetPath set to dotnet
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Located 1 MSBuild instance(s)
            1: StandAlone 16.3 - "/home/tiagodinis/.vscode/extensions/ms-vscode.csharp-1.21.9/.omnisharp/1.34.9/omnisharp/.msbuild/Current/Bin"
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        MSBUILD_EXE_PATH environment variable set to '/home/tiagodinis/.vscode/extensions/ms-vscode.csharp-1.21.9/.omnisharp/1.34.9/omnisharp/.msbuild/Current/Bin/MSBuild.dll'
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Registered MSBuild instance: StandAlone 16.3 - "/home/tiagodinis/.vscode/extensions/ms-vscode.csharp-1.21.9/.omnisharp/1.34.9/omnisharp/.msbuild/Current/Bin"
            CscToolExe = csc.exe
            MSBuildToolsPath = /home/tiagodinis/.vscode/extensions/ms-vscode.csharp-1.21.9/.omnisharp/1.34.9/omnisharp/.msbuild/Current/Bin
            CscToolPath = /home/tiagodinis/.vscode/extensions/ms-vscode.csharp-1.21.9/.omnisharp/1.34.9/omnisharp/.msbuild/Current/Bin/Roslyn
            BypassFrameworkInstallChecks = true
            MSBuildExtensionsPath = /home/tiagodinis/.vscode/extensions/ms-vscode.csharp-1.21.9/.omnisharp/1.34.9/omnisharp/.msbuild
[info]: OmniSharp.Cake.CakeProjectSystem
        Detecting Cake files in '/home/tiagodinis/Unity/Hub/Projects/New Unity Project'.
[info]: OmniSharp.Cake.CakeProjectSystem
        Could not find any Cake files
[info]: OmniSharp.MSBuild.ProjectSystem
        Detecting projects in '/home/tiagodinis/Unity/Hub/Projects/New Unity Project/New Unity Project.sln'.
[info]: OmniSharp.MSBuild.ProjectManager
        Queue project update for '/home/tiagodinis/Unity/Hub/Projects/New Unity Project/Assembly-CSharp.csproj'
[info]: OmniSharp.Script.ScriptProjectSystem
        Detecting CSX files in '/home/tiagodinis/Unity/Hub/Projects/New Unity Project'.
[info]: OmniSharp.Script.ScriptProjectSystem
        Could not find any CSX files
[info]: OmniSharp.MSBuild.ProjectManager
        Loading project: /home/tiagodinis/Unity/Hub/Projects/New Unity Project/Assembly-CSharp.csproj
[info]: OmniSharp.WorkspaceInitializer
        Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpFormattingWorkspaceOptionsProvider, Order: 0
[info]: OmniSharp.WorkspaceInitializer
        Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.RenameWorkspaceOptionsProvider, Order: 100
[info]: OmniSharp.WorkspaceInitializer
        Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.EditorConfigWorkspaceOptionsProvider, Order: 200
[info]: OmniSharp.WorkspaceInitializer
        Configuration finished.
[info]: OmniSharp.Stdio.Host
        Omnisharp server running using Stdio at location '/home/tiagodinis/Unity/Hub/Projects/New Unity Project' on host 21639.
[fail]: OmniSharp.MSBuild.ProjectLoader
        The reference assemblies for .NETFramework,Version=v3.5 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at https://aka.ms/msbuild/developerpacks
[warn]: OmniSharp.MSBuild.ProjectManager
        Failed to load project file '/home/tiagodinis/Unity/Hub/Projects/New Unity Project/Assembly-CSharp.csproj'.
/home/tiagodinis/Unity/Hub/Projects/New Unity Project/Assembly-CSharp.csproj
/home/tiagodinis/.vscode/extensions/ms-vscode.csharp-1.21.9/.omnisharp/1.34.9/omnisharp/.msbuild/Current/Bin/Microsoft.Common.CurrentVersion.targets(1191,5): Error: The reference assemblies for .NETFramework,Version=v3.5 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at https://aka.ms/msbuild/developerpacks

[fail]: OmniSharp.MSBuild.ProjectManager
        Attempted to update project that is not loaded: /home/tiagodinis/Unity/Hub/Projects/New Unity Project/Assembly-CSharp.csproj
2

I’m getting the same set of warnings. It doesn’t seem to impact my builds at all though. Were you able to resolve this?

3

Downgrading the Visual Studio Code Editor integration within the Package Manager from 1.1.4 back to 1.1.3 worked for me. I guess it automatically added the newest version when I upgraded to 2019.3.

1 Like
4

I was going nuts trying to figure this out. The Unity answer did the trick for me, thanks for posting!

5

I have had this for as long as I can remember, I’m still with 2019/2/9, will try the downgrade. :slight_smile: