[dotnet-sdk-9.0.100-preview.3.24175.24] CS1061 error when building OrchardCore

[Junjun-zhao]

Application Name: OrchardCore
OS: Windows 10 21H2
CPU: X64
.NET Build Number: dotnet-sdk-9.0.100-preview.3.24175.24
App Source Location checking at: https://devdiv.visualstudio.com/DevDiv/_workitems/edit/2012346
Github Link: https://github.com/OrchardCMS/OrchardCore

Verify Scenarios:

1. Windows10 21h2 x64 + dotnet-sdk-9.0.100-preview.4.24175.11 + default target .NET 8.0: Fail
2. Windows10 21h2 x64 + dotnet-sdk-9.0.100-preview.3.24175.24 + default target .NET 8.0: Fail
3. Windows10 21h2 x64 + dotnet-sdk-9.0.100-preview.3.24162.5 + default target .NET 8.0: Pass
4. Windows10 21h2 x64 + dotnet-sdk-8.0.202 + default target .NET 8.0: Pass

Description:
CS1061 error shows when we build OrchardCore\src\OrchardCore.Modules\OrchardCore.Taxonomies project with dotnet-sdk-9.0.100-preview.3.24175.24

Repro steps
The machine has dotnet-sdk-9.0.100-preview.3.24175.24 installed

1. Copy app source to local machine
2. In Cmd, go to directory: OrchardCore\src\OrchardCore.Modules\OrchardCore.Taxonomies
3. dotnet build

Expected Result: Build successfully.
Actual Result:

OrchardCore\src\OrchardCore.Modules\OrchardCore.Taxonomies\Controllers\AdminController.cs(145,56): error CS1061: 'JObject' does not contain a definition for 'Terms' and no accessible extension method 'Terms' accepting a first argument of type 'JObject' could be found (are you missing a using directive or an assembly reference?)

Minimal Repro steps (Demo attached):
ConsoleApp9.zip

The machine has dotnet-sdk-9.0.100-preview.3.24175.24 installed.

1. Create 8.0 Console App.

2. Install <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
3. Add this code

 internal class Program
 {
     static void Main(string[] args)
     {
         ContentItem item = new ContentItem();
         var dat =  MyTest(item.As<ContentPart>().Content);
         var items = dat.MyProperty as JArray;
     }
     private static JObject MyTest(JObject content)
     {
         throw new NotImplementedException();
     }
 }
 public class ContentElement
 {
     public JObject Data { get; internal set; }
     public dynamic Content { get { return Data; } }
 }
 public class ContentPart : ContentElement
 {
 }
 public static class ContentItemExtensions
 {
      public static TPart As<TPart>(this ContentItem contentItem) where TPart : ContentPart => contentItem.Get<TPart>(typeof(TPart).Name);
 }
 public class ContentItem
 {
     internal TPart Get<TPart>(string name) where TPart : ContentPart
     {
         throw new NotImplementedException();
     }
 }

4. Build source code with "dotnet build" using 9.0.100-preview.3.24175.24 SDK

Expected Result: Build successfully.
Actual Result:

error CS1061: 'JObject' does not contain a definition for 'MyProperty' and no accessible extension method 'MyProperty' accepting a first argument of type 'JObject' could be found (are you missing a using directive or an assembly reference?)

dotnet info:

C:\Users\v-gwei>dotnet --info
.NET SDK:
 Version:           9.0.100-preview.3.24175.24
 Commit:            09d6f381e6
 Workload version:  9.0.100-manifests.77bb7ba9
 MSBuild version:   17.10.0-preview-24175-03+89b42a486

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.19045
 OS Platform: Windows
 RID:         win-x64
 Base Path:   C:\Program Files\dotnet\sdk\9.0.100-preview.3.24175.24\

.NET workloads installed:
There are no installed workloads to display.

Host:
  Version:      9.0.0-preview.3.24172.9
  Architecture: x64
  Commit:       9e6ba1f68c

.NET SDKs installed:
  9.0.100-preview.3.24175.24 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 9.0.0-preview.3.24172.13 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 9.0.0-preview.3.24172.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 9.0.0-preview.3.24175.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

@dotnet-actwx-bot @dotnet/compat

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[Junjun-zhao]

@marcpopMSFT Could you please help check this issue and confirm if it is a blocker for .NET 9 Preview3? Please help move to the correct team if it is incorrect. Thanks.

[marcpopMSFT]

This should be moved to the Roslyn repo most likely but I don't have permissions to move it. @jaredpar

[jaredpar]

Closing as a duplicate of dotnet/roslyn#72750

[Junjun-zhao]

Verified it with dotnet-sdk-9.0.100-preview.4.24223.3, this issue has been fixed.