How to use Godot-dotnet with GDextension

PotatoArmor · December 8, 2025, 5:41pm

Godot Version

Godot 4.5.1 stable mono

Question

Hi everyone

I am new to GDextension. I mainly use GDScript. I am interested in learning more about GDextension C# and C++ in Godot. I found GitHub - raulsntos/godot-dotnet. I am currently struggling to get it to work.

The reason why I want to use GitHub - raulsntos/godot-dotnet is because there is a scene manager addon (GitHub - esdg/GodotSceneManager: The Scene Manager plugin enhances your Godot development workflow by providing a visual graph editor for managing transitions between scenes.) written in C# that I want to use in my mobile project. My project is written in GDScript and I dont want to switch to Godot .net just to use the addon.

Steps I Took

Create an empty Godot C# project
Download the godot-dotnet project from github
Unzip the project in the empty Godot C# project
Go into the godot-dotnet folder
Open the terminal in the folder
run ./build.sh –build
The build failed with a bunch of errors

Output:
  Tasks succeeded (0,3s) → artifacts/bin/Tasks/Debug/net9.0/Tasks.dll
Restore complete (1,1s)
  Godot.BindingsGenerator.Reflection succeeded (0,2s) → artifacts/bin/Godot.BindingsGenerator.Reflection/Debug/net9.0/Godot.BindingsGenerator.Reflection.dll
  Godot.BindingsGenerator.ApiDump succeeded (0,2s) → artifacts/bin/Godot.BindingsGenerator.ApiDump/Debug/net9.0/Godot.BindingsGenerator.ApiDump.dll
  Godot.EditorIntegration.OpenVisualStudio succeeded (0,2s) → artifacts/bin/Godot.EditorIntegration.OpenVisualStudio/Debug/net9.0-windows/Godot.EditorIntegration.OpenVisualStudio.dll
  Godot.EditorIntegration.MSBuildLogger succeeded (0,3s) → artifacts/bin/Godot.EditorIntegration.MSBuildLogger/Debug/net9.0/Godot.EditorIntegration.MSBuildLogger.dll
  Godot.PluginLoader succeeded (0,2s) → artifacts/bin/Godot.PluginLoader/Debug/net9.0/Godot.PluginLoader.dll
  Godot.Tasks succeeded (0,2s) → artifacts/bin/Godot.Tasks/Debug/net9.0/Godot.Tasks.dll
  Godot.UpgradeAssistant.Core succeeded (0,5s) → artifacts/bin/Godot.UpgradeAssistant.Core/Debug/net9.0/Godot.UpgradeAssistant.Core.dll
  Godot.Common succeeded (0,1s) → artifacts/bin/Godot.Common/Debug/net9.0/Godot.Common.dll
  Godot.Common.Tests succeeded (0,2s) → artifacts/bin/Godot.Common.Tests/Debug/net9.0/Godot.Common.Tests.dll
  Godot.SourceGenerators failed with 2 error(s) (3,8s)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.SourceGenerators/BindMembersGenerator.cs(10,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.SourceGenerators/EntryPointGenerator.cs(13,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
  Godot.Analyzers failed with 12 error(s) (4,2s)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Analyzers/Analyzers/AttributeOutsideGodotClassAnalyzer.cs(11,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Analyzers/Analyzers/BindMethodAnalyzer.cs(8,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Analyzers/Analyzers/BindPropertyAnalyzer.cs(8,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Analyzers/Analyzers/BindConstantAnalyzer.cs(8,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Analyzers/Analyzers/BindConstructorAnalyzer.cs(10,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Analyzers/Analyzers/BoundMembersMustHaveUniqueNamesAnalyzer.cs(10,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Analyzers/Analyzers/GodotClassAnalyzer.cs(8,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Analyzers/Analyzers/GodotClassWithEditorCallbacksMustBeToolAnalyzer.cs(9,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Analyzers/Analyzers/MarshallingRequiresCopyingAnalyzer.cs(8,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Analyzers/Analyzers/MustBeVariantAnalyzer.cs(12,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Analyzers/Analyzers/SignalDelegateNameSuffixAnalyzer.cs(9,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Analyzers/Analyzers/SignalDelegateParameterTypesAnalyzer.cs(9,2): error RS1038: This compiler extension should not be implemented in an assembly containing a reference to Microsoft.CodeAnalysis.Workspaces. The Microsoft.CodeAnalysis.Workspaces assembly is not provided during command line compilation scenarios, so references to it could cause the compiler extension to behave unpredictably. (https://github.com/dotnet/roslyn-analyzers/blob/main/docs/rules/RS1038.md)
  Godot.BindingsGenerator failed with 1 error(s) (3,9s)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.BindingsGenerator/DefaultValueParsers/DefaultValueParser.cs(22,69): error CS1573: Parameter 'typeDB' has no matching param tag in the XML comment for 'DefaultValueParser.Parse(string, TypeDB)' (but other parameters do)
  Godot.UpgradeAssistant.Providers failed with 12 error(s) (1,8s)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Common.CodeAnalysis/Enums/PropertyUsageFlags.cs(97,17): error CS8762: Parameter 'name' must have a non-null value when exiting with 'true'.
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Common.CodeAnalysis/Enums/PropertyUsageFlags.cs(109,25): error CS8762: Parameter 'name' must have a non-null value when exiting with 'true'.
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Common.CodeAnalysis/Enums/PropertyHint.cs(53,14): error CA2263: Prefer the generic overload 'System.Enum.IsDefined<TEnum>(TEnum)' instead of 'System.Enum.IsDefined(System.Type, object)' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2263)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Common.CodeAnalysis/Enums/PropertyHint.cs(58,46): error CA2263: Prefer the generic overload 'System.Enum.GetName<TEnum>(TEnum)' instead of 'System.Enum.GetName(System.Type, object)' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2263)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Common.CodeAnalysis/Enums/VariantType.cs(54,14): error CA2263: Prefer the generic overload 'System.Enum.IsDefined<TEnum>(TEnum)' instead of 'System.Enum.IsDefined(System.Type, object)' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2263)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Common.CodeAnalysis/Enums/VariantType.cs(59,45): error CA2263: Prefer the generic overload 'System.Enum.GetName<TEnum>(TEnum)' instead of 'System.Enum.GetName(System.Type, object)' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2263)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Common.CodeAnalysis/Enums/VariantTypeMetadata.cs(28,14): error CA2263: Prefer the generic overload 'System.Enum.IsDefined<TEnum>(TEnum)' instead of 'System.Enum.IsDefined(System.Type, object)' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2263)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Common.CodeAnalysis/Enums/VariantTypeMetadata.cs(33,60): error CA2263: Prefer the generic overload 'System.Enum.GetName<TEnum>(TEnum)' instead of 'System.Enum.GetName(System.Type, object)' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2263)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Common.CodeAnalysis/Enums/PropertyUsageFlags.cs(51,61): error CA2263: Prefer the generic overload 'System.Enum.GetValues<TEnum>()' instead of 'System.Enum.GetValues(System.Type)' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2263)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Common.CodeAnalysis/Enums/PropertyUsageFlags.cs(58,26): error CA2263: Prefer the generic overload 'System.Enum.GetNames<TEnum>()' instead of 'System.Enum.GetNames(System.Type)' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2263)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Common.CodeAnalysis/Enums/PropertyUsageFlags.cs(96,24): error CA2263: Prefer the generic overload 'System.Enum.GetName<TEnum>(TEnum)' instead of 'System.Enum.GetName(System.Type, object)' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2263)
    /home/user/GodotProjects/dotnet-test/GodotDotnet/src/Godot.Common.CodeAnalysis/Enums/PropertyUsageFlags.cs(108,32): error CA2263: Prefer the generic overload 'System.Enum.GetName<TEnum>(TEnum)' instead of 'System.Enum.GetName(System.Type, object)' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2263)

Build failed with 27 error(s) in 8,9s
Build failed with exit code 1. Check errors above.

Operating System

DotNet SDK Version

I have tried it with version 9.0.2 and 9.0.11. Both gave the same results.

raulsntos · January 10, 2026, 11:04pm

The scene manager addon you mentioned is made using the GodotSharp bindings, so it won’t work with the new godot-dotnet bindings out of the box. Also, godot-dotnet is still a work in progress and is not production ready, so it would be much easier and safer for you to use the .NET/Mono version of Godot rather than build godot-dotnet.

However, if you still want to build godot-dotnet, you have to disable warnings as errors and enable binding generation:

./build.sh --build -warnAsError false /p:GenerateGodotBindings=true

This is a workaround until we fix the warnings and enable generating the bindings by default, and it shows that it’s still very much a work in progress.

PotatoArmor · January 11, 2026, 12:39pm

Thank you for the reply. My game is written in gdscript and I don’t want to use mono just to use the scene manager plugin. I think it is best to wait for the stable release instead.

If it may be of any help. I found RS1038 is being triggered for analyzer + codefixer project when only codefixers reference the workspace types · Issue #7438 · dotnet/roslyn-analyzers · GitHub when searching the error codes.