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Clarify DOTNET_ROOT documentation #47059

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Clarify DOTNET_ROOT documentation
Youssef1313 Jul 2, 2025
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Update docs/core/tools/dotnet-environment-variables.md
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Update docs/core/tools/dotnet-environment-variables.md
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Update docs/core/tools/dotnet-environment-variables.md
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Update dotnet-environment-variables.md
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Update dotnet-environment-variables.md
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Update docs/core/tools/dotnet-environment-variables.md
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5 changes: 4 additions & 1 deletion docs/core/tools/dotnet-environment-variables.md
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Expand Up @@ -199,7 +199,10 @@ Specifies the location of the .NET runtimes, if they are not installed in the de
- GitHub issue [dotnet/core#7699](https://github.com/dotnet/core/issues/7699)
- GitHub issue [dotnet/runtime#79237](https://github.com/dotnet/runtime/issues/79237)

This environment variable is used only when running apps via generated executables (apphosts). `DOTNET_ROOT(x86)` is used instead when running a 32-bit executable on a 64-bit OS. `DOTNET_ROOT_X64` is used instead when running a 64-bit executable on an ARM64 OS.
This environment variable is used only when running apps via generated executables (apphosts).

- If running 64-bit executable on either ARM64 OS or 64-bit OS, `DOTNET_ROOT_X64` is used first, and if not set, `DOTNET_ROOT` is used instead.
- If running 32-bit executable on either 64-bit OS or 32-bit OS, `DOTNET_ROOT_X86` is used first. Then, `DOTNET_ROOT(x86)` is considered only under 64-bit OS. Then, `DOTNET_ROOT` is used.

### `DOTNET_HOST_PATH`

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