VS .NET Aspire Orchestrator Support failes with Can't find program main in the .NET Aspire hosting project
- Dominant language
- C#
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Description
### Is there an existing issue for this?
- [x] I have searched the existing issues
### Describe the bug
In Visual Studio 2022 and 2026 when adding `.NET Aspire Orchestrator Support` the process fails with the following error:
And the resulting changes to the solution are incomplete.
This only happens when you have the following rule in the `.editorconfig` file:
```
csharp_style_prefer_top_level_statements = false:silent
```
### Expected Behavior
VS should be able to add Aspire even if the project is set to not use top level statements.
### Steps To Reproduce
1. Create an ASP.NET Core Web API project in VS
2. Add the following `.editorconfig` file:
```
root = true
[*.cs]
csharp_style_prefer_top_level_statements = false:silent
```
3. Right-click on the project and `Add` > `.NET Aspire Orchestrator Support`
### Exceptions (if any)
_No response_
### .NET Version info
```
.NET SDK:
Version: 10.0.100-rc.1.25451.107
Commit: 2db1f5ee2b
Workload version: 10.0.100-manifests.a6e8bec0
MSBuild version: 17.15.0-preview-25451-107+2db1f5ee2
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.1.25451.107\
.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.1.25451.107
Architecture: x64
Commit: 2db1f5ee2b
.NET SDKs installed:
9.0.305 [C:\Program Files\dotnet\sdk]
10.0.100-rc.1.25451.107 [C:\Program Files\dotnet\sdk]
.NET runtimes installed:
Microsoft.AspNetCore.App 8.0.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 10.0.0-rc.1.25451.107 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 8.0.20 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 10.0.0-rc.1.25451.107 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 8.0.20 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.9 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 10.0.0-rc.1.25451.107 [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]
Environment variables:
Not set
global.json file:
Not found
Learn more:
https://aka.ms/dotnet/info
Download .NET:
https://aka.ms/dotnet/download
```
### Anything else?
.NET Aspire 9.4.2
VS: 2022 and 2026
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Assessment
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