IAsyncDisposable not working

[truthz03]

Hi,

I have a component which inherits from OwningComponentBase.
If I change the page all scoped services from this component disposes.

So if I implement the IDisposable inside one of my scoped services everything is ok.

My problem is that I want to save data before disposing the service.
But If I implement IAsyncDisposable insead of IDisposable inside my service I get an error:

blazor.webassembly.js:1 crit: Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100]
      Unhandled exception rendering component: 'XYZ.Client.Services.Objectsecurity.ObjectsecurityService' type only implements IAsyncDisposable. Use DisposeAsync to dispose the container.
System.InvalidOperationException: 'XYZ.Client.Services.Objectsecurity.ObjectsecurityService' type only implements IAsyncDisposable. Use DisposeAsync to dispose the container.
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.Dispose()
   at Microsoft.AspNetCore.Components.OwningComponentBase.System.IDisposable.Dispose()
   at Microsoft.AspNetCore.Components.Rendering.ComponentState.TryDisposeInBatch(RenderBatchBuilder batchBuilder, Exception& exception)

Is IAsyncDisposable not supported yet?
What can I do alternatively?

Thanks Thomas

[SteveSandersonMS]

We didn't yet add IAsyncDisposable support to OwningComponentBase, but you can implement it manually on your subclass.

In your .razor component that has @inherits OwningComponentBase<TSomething>, add:

@implements IAsyncDisposable

Then in your component's @code block, also add:

public ValueTask DisposeAsync() => Service.DisposeAsync();

I'm filing #25873 to track improving this.