diff --git a/framework/src/Volo.Abp.Auditing/Volo/Abp/Auditing/InternalUtils.cs b/framework/src/Volo.Abp.Auditing/Volo/Abp/Auditing/InternalUtils.cs
index bec3a42eac..d2b2e13f57 100644
--- a/framework/src/Volo.Abp.Auditing/Volo/Abp/Auditing/InternalUtils.cs
+++ b/framework/src/Volo.Abp.Auditing/Volo/Abp/Auditing/InternalUtils.cs
@@ -1,4 +1,6 @@
-namespace Volo.Abp.Auditing;
+using System;
+
+namespace Volo.Abp.Auditing;
 
 internal static class InternalUtils
 {
diff --git a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/DefaultBlobProviderSelector.cs b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/DefaultBlobProviderSelector.cs
index 007a0a542a..1081125438 100644
--- a/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/DefaultBlobProviderSelector.cs
+++ b/framework/src/Volo.Abp.BlobStoring/Volo/Abp/BlobStoring/DefaultBlobProviderSelector.cs
@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Linq;
 using JetBrains.Annotations;
 using Volo.Abp.DependencyInjection;