IOC resolve abstract class throw exception

[dynh]

    public abstract class ClassService {
        public abstract string GetName();
    }

        [ExportMany(ContractKey = "d")]
        public class TestResolveFromAbstract : ClassService
        {
            public override string GetName()
            {
                return "sunny";
            }
        }

        Assert.Equals(container.Resolve<ClassService>(IfUnresolved.Throw, "d").GetName(), "sunny");

The exception message: no factory registered to type ZKWebStandard.Tests.IocContainer.ContainerTest+ClassService and service key d

[303248153]

How did you register the service to container? the following methods are supported.

• container.RegisterExports(typeof(TestResolveFromAbstract))
• container.RegisterMany<TestResolveFromAbstract>(serviceKey: "d")
• container.Register<ClassService, TestResolveFromAbstract>(serviceKey: "d")

[303248153]

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