C# 9 positional records - support for Microsoft.Extensions.Configuration.ConfigurationBinder

[iSeiryu]

Description

appsettings.json

{
  "Azure": {
    "BaseUrl": "https://azure.com",
    "TenantId": "Id"
  }
}

record

public sealed record AzureInfo(string BaseUrl, string TenantId);

Startup.cs

var appInfo = configuration.GetSection("Azure").Get<AzureInfo>();

Getting exception

System.InvalidOperationException: Cannot create instance of type 'AzureInfo' because it is missing a public parameterless constructor.
   at Microsoft.Extensions.Configuration.ConfigurationBinder.CreateInstance(Type type)
   at Microsoft.Extensions.Configuration.ConfigurationBinder.BindInstance(Type type, Object instance, IConfiguration config, BinderOptions options)
   at Microsoft.Extensions.Configuration.ConfigurationBinder.Get(IConfiguration configuration, Type type, Action`1 configureOptions)
   at Microsoft.Extensions.Configuration.ConfigurationBinder.Get[T](IConfiguration configuration, Action`1 configureOptions)
   at Microsoft.Extensions.Configuration.ConfigurationBinder.Get[T](IConfiguration configuration)

Configuration

mcr.microsoft.com/dotnet/sdk:latest

Other information

The extension is located here: https://github.com/dotnet/runtime/blob/0fad9d646359c71f4d5e9443500fd9248ce10aa4/src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs

Workaround

If I change my record to this it works

public sealed record AzureInfo {
    public string BaseUrl { get; init; }
    public string TenantId { get; init; }
}

[ghost]

Tagging subscribers to this area: @safern
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Description

appsettings.json

{
  "Azure": {
    "BaseUrl": "https://azure.com",
    "TenantId": "Id"
  }
}

record

public sealed record AzureInfo(string BaseUrl, string TenantId);

Startup.cs

var appInfo = configuration.GetSection("Azure").Get<AzureInfo>();

Getting exception

System.InvalidOperationException: Cannot create instance of type 'AzureInfo' because it is missing a public parameterless constructor.
   at Microsoft.Extensions.Configuration.ConfigurationBinder.CreateInstance(Type type)
   at Microsoft.Extensions.Configuration.ConfigurationBinder.BindInstance(Type type, Object instance, IConfiguration config, BinderOptions options)
   at Microsoft.Extensions.Configuration.ConfigurationBinder.Get(IConfiguration configuration, Type type, Action`1 configureOptions)
   at Microsoft.Extensions.Configuration.ConfigurationBinder.Get[T](IConfiguration configuration, Action`1 configureOptions)
   at Microsoft.Extensions.Configuration.ConfigurationBinder.Get[T](IConfiguration configuration)

Configuration

mcr.microsoft.com/dotnet/sdk:latest

Other information

The extension is located here: https://github.com/dotnet/runtime/blob/0fad9d646359c71f4d5e9443500fd9248ce10aa4/src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs

Workaround

If I change my record to this it works

public sealed record AzureInfo {
    public string BaseUrl { get; init; }
    public string TenantId { get; init; }
}

Author:	iSeiryu
Assignees:	-
Labels:	area-System.Configuration, untriaged
Milestone:	-

[ghost]

Tagging subscribers to this area: @maryamariyan
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Description

appsettings.json

{
  "Azure": {
    "BaseUrl": "https://azure.com",
    "TenantId": "Id"
  }
}

record

public sealed record AzureInfo(string BaseUrl, string TenantId);

Startup.cs

var appInfo = configuration.GetSection("Azure").Get<AzureInfo>();

Getting exception

System.InvalidOperationException: Cannot create instance of type 'AzureInfo' because it is missing a public parameterless constructor.
   at Microsoft.Extensions.Configuration.ConfigurationBinder.CreateInstance(Type type)
   at Microsoft.Extensions.Configuration.ConfigurationBinder.BindInstance(Type type, Object instance, IConfiguration config, BinderOptions options)
   at Microsoft.Extensions.Configuration.ConfigurationBinder.Get(IConfiguration configuration, Type type, Action`1 configureOptions)
   at Microsoft.Extensions.Configuration.ConfigurationBinder.Get[T](IConfiguration configuration, Action`1 configureOptions)
   at Microsoft.Extensions.Configuration.ConfigurationBinder.Get[T](IConfiguration configuration)

Configuration

mcr.microsoft.com/dotnet/sdk:latest

Other information

The extension is located here: https://github.com/dotnet/runtime/blob/0fad9d646359c71f4d5e9443500fd9248ce10aa4/src/libraries/Microsoft.Extensions.Configuration.Binder/src/ConfigurationBinder.cs

Workaround

If I change my record to this it works

public sealed record AzureInfo {
    public string BaseUrl { get; init; }
    public string TenantId { get; init; }
}

Author:	iSeiryu
Assignees:	-
Labels:	area-Extensions-Configuration, area-System.Configuration, untriaged
Milestone:	-

[davidfowl]

Dupe of #43662