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Q&A How do you fix 'Failed to load the dll hostfxr.dll' when starting an x86 .NET process in a test run via dotnet test?

Remove DOTNET_ROOT environment variable before process start process.StartInfo.EnvironmentVariables.Remove("DOTNET_ROOT"); Another option is to use the x86 .NET SDK for running the tests: ...

posted 1mo ago by riQQ‭

Answer
#1: Initial revision by user avatar riQQ‭ · 2024-05-08T10:19:03Z (about 1 month ago)
> Remove `DOTNET_ROOT` environment variable before process start
>
>  `process.StartInfo.EnvironmentVariables.Remove("DOTNET_ROOT");`

Another option is to use the x86 .NET SDK for running the tests:

> `& "C:\Program Files (x86)\dotnet\dotnet" test`

Source: https://github.com/dotnet/sdk/issues/22647#issuecomment-973898754