What was changed in the DI container , v1.9.0-preview-18169

[hyzx86]

Describe the bug

To Reproduce

Steps to reproduce the behavior:

I recently updated to 1.9.0-preview-18169 and found that the original service replacement code did not work and threw the following exception,
This service descriptor is keyed. Your service provider may not support keyed services

But it worked fine in previous versions. Have we made any recent changes to the container? What is the recommended practice?

The following code is just one example, and I've actually replaced many implementations ：

           var ocLuceneIndexingHandler =
               services.FirstOrDefault(x =>   x.ImplementationType == typeof(LuceneIndexingContentHandler));
    if (ocLuceneIndexingHandler != null)
    {
        services.Remove(ocLuceneIndexingHandler);
        services.AddScoped<IContentHandler, EocLuceneIndexingContentHandler>();
    }

Expected behavior

A clear and concise description of what you expected to happen.

Screenshots

 EasyOC.Scripting.Queries.Tests.ScriptQueryServiceTests.DynamicIndexTest
  源: ScriptQueryServiceTests.cs 行 237
  持续时间: 12.4 秒

 消息: 
System.InvalidOperationException : This service descriptor is keyed. Your service provider may not support keyed services.

 堆栈跟踪: 
ServiceDescriptor.ThrowKeyedDescriptor()
ServiceDescriptor.get_ImplementationType()
<>c.<ConfigureServices>b__0_0(ServiceDescriptor x) 行 19
Enumerable.TryGetFirst[TSource](IEnumerable`1 source, Func`2 predicate, Boolean& found)
Enumerable.FirstOrDefault[TSource](IEnumerable`1 source, Func`2 predicate)
Startup.ConfigureServices(IServiceCollection services) 行 18
ShellContainerFactory.CreateContainerAsync(ShellSettings settings, ShellBlueprint blueprint)
ShellContextFactory.CreateDescribedContextAsync(ShellSettings settings, ShellDescriptor shellDescriptor)
IShellContextFactory.CreateShellContextAsync(ShellSettings settings)
ShellHost.GetOrCreateShellContextAsync(ShellSettings settings)
<另外 37 个帧…>
ShellScope.UsingAsync(Func`2 execute, Boolean activateShell)
ModularTenantContainerMiddleware.Invoke(HttpContext httpContext)
<<SendAsync>g__RunRequestAsync|0>d.MoveNext()
--- End of stack trace from previous location ---
ClientHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
SiteContext.InitializeAsync(String recipeName) 行 104
ScriptQueryContext.InitializeAsync() 行 15
ScriptQueryServiceTests.DynamicIndexTest() 行 240
--- End of stack trace from previous location ---

 (结果具有附加输出) 

  打开测试日志

[hyzx86]

Hi @MikeAlhayek ， is this issue related to this PR #14998 ?

[hyzx86]

resolved ,just add a condition !x.IsKeyedService

     var ocLuceneIndexingHandler =
               services.FirstOrDefault(x => !x.IsKeyedService&&   x.ImplementationType == typeof(LuceneIndexingContentHandler));
    if (ocLuceneIndexingHandler != null)
    {
        services.Remove(ocLuceneIndexingHandler);
        services.AddScoped<IContentHandler, EocLuceneIndexingContentHandler>();
    }