Unable to resolve service for type System.Collections.Generic.IAsyncEnumerable

Question

I'm having this exception:

System.InvalidOperationException: 'Unable to resolve service for type 'System.Collections.Generic.IAsyncEnumerable`1[MyProject.Interfaces.IFooReader]' while attempting to activate 'MyProject.Services.FooService'.'

while trying to resolve IFooService with var fooService = provider.GetRequiredService<IFooService>();.

Here is the FooService class:

public class FooService : IFooService
{
    private readonly IAsyncEnumerable<IFooReader> _foosReaders;

    public PriceService(IAsyncEnumerable<IFooReader> foosReaders)
    {
        this._foosReaders = foosReaders;            
    }
}

Here is the DI container:

services.AddScoped<IFooReader, FooServiceA>(); 
services.AddScoped<IFooReader, FooServiceB>(); 
services.AddScoped<IFooReader, FooServiceC>(); 

services.AddScoped<IFooService, FooService>(); //assuming stateless

It looks like the native .net-core DI container does not support injection of IAsyncEnumerable, any way to resolve this?

Answer 1

Use of IEnumerable instead of IAsncEnumerable should resolve this issue.

 public class FooService : IFooService

{
    private readonly IEnumerable<IFooReader> _foosReaders;

    public PriceService(IEnumerable<IFooReader> foosReaders)
    {
        this._foosReaders = foosReaders;            
    }
}