diff --git a/src/Volo.DependencyInjection/Microsoft/Extensions/DependencyInjection/ServiceCollectionRegistrationExtensions.cs b/src/Volo.DependencyInjection/Microsoft/Extensions/DependencyInjection/ServiceCollectionRegistrationExtensions.cs
index 947253505c..1eb3661534 100644
--- a/src/Volo.DependencyInjection/Microsoft/Extensions/DependencyInjection/ServiceCollectionRegistrationExtensions.cs
+++ b/src/Volo.DependencyInjection/Microsoft/Extensions/DependencyInjection/ServiceCollectionRegistrationExtensions.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Reflection;
-using Volo.DependencyInjection;
 
 namespace Microsoft.Extensions.DependencyInjection
 {
diff --git a/src/Volo.DependencyInjection/Volo/DependencyInjection/DefaultConventionalRegistrar.cs b/src/Volo.DependencyInjection/Volo/DependencyInjection/DefaultConventionalRegistrar.cs
index dc3abf264e..62c0a01d7f 100644
--- a/src/Volo.DependencyInjection/Volo/DependencyInjection/DefaultConventionalRegistrar.cs
+++ b/src/Volo.DependencyInjection/Volo/DependencyInjection/DefaultConventionalRegistrar.cs
@@ -25,6 +25,8 @@ namespace Volo.DependencyInjection
                 return;
             }
 
+            //TODO: Should have a list of ignored interfaces for exposed services. Say that MyTransientDependency class should not registered for ITransientDependency interface.
+
             foreach (var serviceType in AutoRegistrationHelper.GetExposedServices(type))
             {
                 var serviceDescriptor = ServiceDescriptor.Describe(serviceType, type, lifeTime.Value);
diff --git a/test/Volo.DependencyInjection.Tests/Microsoft/Extensions/DependencyInjection/AbpConventionalDependencyInjectionExtensions_Tests.cs b/test/Volo.DependencyInjection.Tests/Microsoft/Extensions/DependencyInjection/AbpConventionalDependencyInjectionExtensions_Tests.cs
index 367757b8f8..c9e4126838 100644
--- a/test/Volo.DependencyInjection.Tests/Microsoft/Extensions/DependencyInjection/AbpConventionalDependencyInjectionExtensions_Tests.cs
+++ b/test/Volo.DependencyInjection.Tests/Microsoft/Extensions/DependencyInjection/AbpConventionalDependencyInjectionExtensions_Tests.cs
@@ -5,6 +5,9 @@ using Xunit;
 
 namespace Microsoft.Extensions.DependencyInjection
 {
+    //TODO: Add unit test for:
+    // - IConventionalRegistrar
+
     public class AbpConventionalDependencyInjectionExtensions_Tests
     {
         private readonly IServiceCollection _services;