`dotnet run` doesn't work if project exceeds `MAX_PATH`

[afscrome]

Describe the bug

If your project path exceeds max path length on windows, dotnet run won't run your app

To Reproduce

(Windows only I assume)

cd s:\

mkdir ReallyReallyReallyReallyReallyReallyReallyReallyRealyReallyReallyReallyReallyReallyReallyReallyReallyReallyRealyReallyReallyReallyReallyReallyRealyReallyReallyReallyReallyReallyRealyReallyReallyReallyReallyReallyRealyReallyLongFolderNameToMessWithMaxPath

cd ReallyReallyReallyReallyReallyReallyReallyReallyRealyReallyReallyReallyReallyReallyReallyReallyReallyReallyRealyReallyReallyReallyReallyReallyRealyReallyReallyReallyReallyReallyRealyReallyReallyReallyReallyReallyRealyReallyLongFolderNameToMessWithMaxPath

dotnet new console -o test

dotnet run --project test

Exceptions (if any)

Unhandled exception: An error occurred trying to start process 'S:\...\test\bin\Debug\net10.0\test.exe' with working directory 'S:\…'. The filename or extension is too long.

Further technical details

details of dotnet --info

.NET SDK: Version: 10.0.100-rc.2.25502.107 Commit: 89c8f6a112 Workload version: 10.0.100-manifests.18c66609 MSBuild version: 18.0.0-preview-25502-107+89c8f6a11

Runtime Environment:
OS Name: Windows
OS Version: 10.0.26100
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\10.0.100-rc.2.25502.107\

.NET workloads installed:
There are no installed workloads to display.
Configured to use workload sets when installing new manifests.
No workload sets are installed. Run "dotnet workload restore" to install a workload set.

Host:
Version: 10.0.0-rc.2.25502.107
Architecture: x64
Commit: 89c8f6a112

.NET SDKs installed:
8.0.415 [C:\Program Files\dotnet\sdk]
9.0.306 [C:\Program Files\dotnet\sdk]
10.0.100-rc.2.25502.107 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 8.0.21 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 10.0.0-rc.2.25502.107 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 8.0.21 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 10.0.0-rc.2.25502.107 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 8.0.21 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 10.0.0-rc.2.25502.107 [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]

global.json file:
Not found

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

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