Source generated configuration binder error

[akoken]

Description

I followed the guide in the doc, but build fails.

Reproduction Steps

• Create a new app: dotnet new webapiaot
• Enable configuration binder

<PropertyGroup>
    <EnableConfigurationBindingGenerator>true</EnableConfigurationBindingGenerator>
</PropertyGroup>

• Program.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
IConfigurationSection section = builder.Configuration.GetSection("MyOptions");

// !! Configure call - to be replaced with source-gen'd implementation
builder.Services.Configure<MyOptions>(section);

// !! Get call - to be replaced with source-gen'd implementation
MyOptions options0 = section.Get<MyOptions>();

// !! Bind call - to be replaced with source-gen'd implementation
MyOptions options1 = new MyOptions();
section.Bind(options1);

WebApplication app = builder.Build();
app.MapGet("/", () => "Hello World!");
app.Run();

public class MyOptions
{
    public int A { get; set; }
    public string S { get; set; }
    public byte[] Data { get; set; }
    public Dictionary<string, string> Values { get; set; }
    public List<MyClass> Values2 { get; set; }
}

public class MyClass
{
    public int SomethingElse { get; set; }
}

• Publish application

dotnet publish -r win-x64 -c Release

Expected behavior

Program compiles without error and warnings.

Actual behavior

Build fails with the following source generation errors:

MSBuild version 17.8.0-preview-23418-03+0125fc9fb for .NET
  Determining projects to restore...
  All projects are up-to-date for restore.
C:\Program Files\dotnet\sdk\8.0.100-rc.1.23463.5\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.RuntimeIdentifierInferenc
e.targets(311,5): message NETSDK1057: You are using a preview version of .NET. See: https://aka.ms/dotnet-support-polic
y [C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\NativeAOT.Demo.csproj]
C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\Microsoft.Extensions.Configuration.Binder.SourceGeneration\Mi
crosoft.Extensions.Configuration.Binder.SourceGeneration.ConfigurationBindingGenerator\BindingExtensions.g.cs(80,227):
error CS1003: Syntax error, ',' expected [C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\NativeAOT.Demo.cspr
oj]
C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\Microsoft.Extensions.Configuration.Binder.SourceGeneration\Mi
crosoft.Extensions.Configuration.Binder.SourceGeneration.ConfigurationBindingGenerator\BindingExtensions.g.cs(79,35): e
rror CS0246: The type or namespace name 'IOptionsChangeTokenSource<>' could not be found (are you missing a using direc
tive or an assembly reference?) [C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\NativeAOT.Demo.csproj]
C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\Microsoft.Extensions.Configuration.Binder.SourceGeneration\Mi
crosoft.Extensions.Configuration.Binder.SourceGeneration.ConfigurationBindingGenerator\BindingExtensions.g.cs(79,76): e
rror CS0246: The type or namespace name 'ConfigurationChangeTokenSource<>' could not be found (are you missing a using
directive or an assembly reference?) [C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\NativeAOT.Demo.csproj]

Regression?

Unfortunately I'm not sure.

Known Workarounds

N/A

Configuration

Version: .NET 8 RC1
SDK: 8.0.100-rc.1.23463.5
Runtime: Microsoft.AspNetCore.App 8.0.0-rc.1.23421.29
OS: Windows 11 x64, Version 21H2 (Build 22000.2416)

Other information

No response

[ghost]

Tagging subscribers to this area: @dotnet/area-extensions-configuration
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Description

I followed the guide in the doc, but build fails.

Reproduction Steps

• Create a new app: dotnet new webapiaot
• Add configuration binder package to *.csproj

<PropertyGroup>
    <EnableConfigurationBindingGenerator>true</EnableConfigurationBindingGenerator>
</PropertyGroup>

• Program.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
IConfigurationSection section = builder.Configuration.GetSection("MyOptions");

// !! Configure call - to be replaced with source-gen'd implementation
builder.Services.Configure<MyOptions>(section);

// !! Get call - to be replaced with source-gen'd implementation
MyOptions options0 = section.Get<MyOptions>();

// !! Bind call - to be replaced with source-gen'd implementation
MyOptions options1 = new MyOptions();
section.Bind(options1);

WebApplication app = builder.Build();
app.MapGet("/", () => "Hello World!");
app.Run();

public class MyOptions
{
    public int A { get; set; }
    public string S { get; set; }
    public byte[] Data { get; set; }
    public Dictionary<string, string> Values { get; set; }
    public List<MyClass> Values2 { get; set; }
}

public class MyClass
{
    public int SomethingElse { get; set; }
}

• Publish application

dotnet publish -r win-x64 -c Release

Expected behavior

Program compiles without error and warnings.

Actual behavior

Build fails with the following source generation errors:

MSBuild version 17.8.0-preview-23418-03+0125fc9fb for .NET
  Determining projects to restore...
  All projects are up-to-date for restore.
C:\Program Files\dotnet\sdk\8.0.100-rc.1.23463.5\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.RuntimeIdentifierInferenc
e.targets(311,5): message NETSDK1057: You are using a preview version of .NET. See: https://aka.ms/dotnet-support-polic
y [C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\NativeAOT.Demo.csproj]
C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\Microsoft.Extensions.Configuration.Binder.SourceGeneration\Mi
crosoft.Extensions.Configuration.Binder.SourceGeneration.ConfigurationBindingGenerator\BindingExtensions.g.cs(80,227):
error CS1003: Syntax error, ',' expected [C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\NativeAOT.Demo.cspr
oj]
C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\Microsoft.Extensions.Configuration.Binder.SourceGeneration\Mi
crosoft.Extensions.Configuration.Binder.SourceGeneration.ConfigurationBindingGenerator\BindingExtensions.g.cs(79,35): e
rror CS0246: The type or namespace name 'IOptionsChangeTokenSource<>' could not be found (are you missing a using direc
tive or an assembly reference?) [C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\NativeAOT.Demo.csproj]
C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\Microsoft.Extensions.Configuration.Binder.SourceGeneration\Mi
crosoft.Extensions.Configuration.Binder.SourceGeneration.ConfigurationBindingGenerator\BindingExtensions.g.cs(79,76): e
rror CS0246: The type or namespace name 'ConfigurationChangeTokenSource<>' could not be found (are you missing a using
directive or an assembly reference?) [C:\Users\source\repos\NativeAOT.Demo\NativeAOT.Demo\NativeAOT.Demo.csproj]

Regression?

Unfortunately I'm not sure.

Known Workarounds

Configuration

Version: .NET 8 RC1
SDK: 8.0.100-rc.1.23463.5
Runtime: Microsoft.AspNetCore.App 8.0.0-rc.1.23421.29
OS: Windows 11 x64, Version 21H2 (Build 22000.2416)

Other information

No response

Author:	akoken
Assignees:	-
Labels:	untriaged, area-Extensions-Configuration
Milestone:	-

[jamiewinder]

Apparently due to be fixed in RC2: #92021 (comment)

[akoken]

Thanks @jamiewinder. Since it's the same issue, I'm closing this one.