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Editorial pass over the dotnet.config file removal #10170

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22 changes: 6 additions & 16 deletions release-notes/10.0/known-issues.md
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Expand Up @@ -27,18 +27,18 @@ Add the following to a `Directory.Build.props` file that is imported in all MAUI

The behavior will be **fixed in the .NET 10 preview 5** release. The workaround should be removed after that release.

## `dotnet.config` will be removed in favor of `global.json`
## `global.json` is used for test runner selection instead of `dotnet.config`

In .NET 10, we introduced `dotnet.config` file that is used to set the test runner and is the way to opt-in using `dotnet test` for Microsoft.Testing.Platform. This is already shipping in RC1, but will be removed in RC2.
In .NET 10 versions up to RC1, we supported the use of a `dotnet.config` file, an INI-formatted file that is currently used only to set the test runner to use with `dotnet test`. Setting this is required in order to use the new Microsoft.Testing.Platform. In 10.0.100 RC2 and beyond, the use of this file is removed in favor of the pre-existing `dotnet.config` file.

The `dotnet.config` used to look like:
Instead of using `dotnet.config` to specify a runner:

```ini
[dotnet.test.runner]
name = "Microsoft.Testing.Platform"
```

With `global.json`, this becomes:
`global.json` uses the following to specify the same runner:

```json
{
Expand All @@ -48,18 +48,7 @@ With `global.json`, this becomes:
}
```

A `global.json` that sets SDK version along with the test runner will look like:

```json
{
"sdk": {
"version": "<version>"
},
"test": {
"runner": "Microsoft.Testing.Platform"
}
}
```
This change is done in response to user feedback about the relative lack of utility of `dotnet.config` at this time.

## Startup Performance Regression in Fractional CPU Containers

Expand Down Expand Up @@ -89,3 +78,4 @@ SDK and runtime installers for macOS install a `createdump` binary that lacks th

- Add the executable bit to `shared/Microsoft.NETCore.App/10.0.0/createdump` manually using `chmod +x`
- Use another runtime hosting mechanism (self-contained app, use a tarball installation of the runtime/SDK)