我在Asp.Net Core应用程序中有一个简单的传奇配置：

services.AddSingleton<ISagaRepository<Request>,InmemorySagaRepository<Request>>();
services.AddMassTransit(x =>
{
    x.AddSagaStateMachine<RequestStateMachine,Request>();
    x.AddRequestClient<IRequestCreated>();
    x.AddBus(provider => Bus.Factory.CreateUsingInmemory(cfg =>
    {
        cfg.UseInmemoryOutbox();
        cfg.ConfigureEndpoints(provider);
    }));
});

如果以后我通过IRequestClient<IRequestCreated>向Saga发送消息：

var client = context.RequestServices.GetService<IRequestClient<IRequestCreated>>();
var response = await client.GetResponse<RequestCreatedResponse>(new
{
    CorrelationId = Guid.NewGuid(),ClientId = 1,});

一切正常。但是，如果我在IBus上尝试相同的操作：

var mtbus = context.RequestServices.GetService<IBus>();
await mtbus.Send<IRequestCreated>(new
{
    CorrelationId = Guid.NewGuid(),});

我收到错误A convention for the message type Sample.AspNetCore.Host.Saga.IRequestCreated was not found

我想念什么？