`dotnet workload uninstall` cannot find workload returned by `dotnet workload list`

[ReubenBond]

Describe the bug

I want to uninstall a workload which dotnet workload list says I have installed, but dotnet workload uninstall says that workload id could not be found.

To Reproduce

I cannot uninstall this workload since it cannot be found:

> dotnet workload uninstall maui-windows

Workload uninstallation failed: Couldn't find workload ID(s): maui-windows

... but if I list installed workloads, it's here:

> dotnet workload list

Installed Workload Id      Manifest Version                      Installation Source
------------------------------------------------------------------------------------------------
aspire                     8.1.0-preview.1.24251.12/8.0.100      SDK 8.0.200, VS 17.11.34901.157
android                    34.0.94/8.0.200                       VS 17.11.34901.157
maccatalyst                17.2.8062/8.0.100                     VS 17.11.34901.157
maui-windows               8.0.21/8.0.100                        VS 17.11.34901.157
ios                        17.2.8062/8.0.100                     VS 17.11.34901.157

Use `dotnet workload search` to find additional workloads to install.

I would guess the issue is related to the installation source being VS. Perhaps the output should explain that I need to uninstall the workload from the VS installer, if that's the case.

Further technical details

dotnet --info

dotnet --info
.NET SDK:
 Version:           8.0.204
 Commit:            c338c7548c
 Workload version:  8.0.200-manifests.36aa5852

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.22631
 OS Platform: Windows
 RID:         win-x64
 Base Path:   C:\Program Files\dotnet\sdk\8.0.204\

.NET workloads installed:
 [aspire]
   Installation Source: SDK 8.0.200, VS 17.11.34901.157
   Manifest Version:    8.1.0-preview.1.24204.10/8.0.100
   Manifest Path:       C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.aspire\8.1.0-preview.1.24204.10\WorkloadManifest.json
   Install Type:        FileBased

 [android]
   Installation Source: VS 17.11.34901.157
   Manifest Version:    34.0.94/8.0.200
   Manifest Path:       C:\Program Files\dotnet\sdk-manifests\8.0.200\microsoft.net.sdk.android\34.0.94\WorkloadManifest.json
   Install Type:              Msi

 [maccatalyst]
   Installation Source: VS 17.11.34901.157
   Manifest Version:    17.2.8053/8.0.100
   Manifest Path:       C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.maccatalyst\17.2.8053\WorkloadManifest.json
   Install Type:        FileBased

 [maui-windows]
   Installation Source: VS 17.11.34901.157
   Manifest Version:    8.0.21/8.0.100
   Manifest Path:       C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.maui\8.0.21\WorkloadManifest.json
   Install Type:        FileBased

 [ios]
   Installation Source: VS 17.11.34901.157
   Manifest Version:    17.2.8053/8.0.100
   Manifest Path:       C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.ios\17.2.8053\WorkloadManifest.json
   Install Type:        FileBased


Host:
  Version:      9.0.0-preview.4.24204.3
  Architecture: x64
  Commit:       ffb257818d

.NET SDKs installed:
  6.0.421 [C:\Program Files\dotnet\sdk]
  7.0.408 [C:\Program Files\dotnet\sdk]
  8.0.204 [C:\Program Files\dotnet\sdk]
  8.0.300-preview.0.24216.11 [C:\Program Files\dotnet\sdk]
  8.0.300-preview.24203.14 [C:\Program Files\dotnet\sdk]
  9.0.100-preview.4.24207.3 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.29 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 7.0.18 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 8.0.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 8.0.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 9.0.0-preview.4.24205.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 3.1.32 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.29 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.18 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 8.0.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 8.0.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 9.0.0-preview.4.24204.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.29 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 7.0.18 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 8.0.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 8.0.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 9.0.0-preview.4.24204.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
  x86   [C:\Program Files (x86)\dotnet]
    registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
  Not set

global.json file:
  C:\dev\aspire\global.json

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download

[nagilson]

'I would guess the issue is related to the installation source being VS. Perhaps the output should explain that I need to uninstall the workload from the VS installer, if that's the case.'

That is correct! And yes we should have really added that some time ago.

[danmoseley]

I've now hit this again today myself. I think this is valuable to improve.

[cfoster7023]

I've hit this also. I am trying to remove MAUI to get the newest version so I can install the CommunityToolkit.MAUI. However, I uninstalled via VS2022 and it shows MAUI workload is not loaded but when I use the "dotnet workload list" command it shows them still loaded. When I use "dotnet workload uninstall maui-windows" it says it can't find it. How can I uninstall so that I can then install the latest? I've tried the update but it doesn't work. It shows 8.0.7/8.0.100 as the Manifest version. I have tried getting the new SDK and it shows I am at 8.0.4 (did this because of dotnet/maui#20600).

[baronfel]

This hit @stephentoub as well - we should target this for 8.0.400.

[nagilson]

Our new hire is no more -- let's figure out who is going to do this