diff --git a/src/Cosmos.I18N.Extensions.Autofac/Cosmos/AutofacRegisterExtensions.cs b/src/Cosmos.I18N.Extensions.Autofac/Cosmos/AutofacRegisterExtensions.cs
index f6468e7..276cd58 100644
--- a/src/Cosmos.I18N.Extensions.Autofac/Cosmos/AutofacRegisterExtensions.cs
+++ b/src/Cosmos.I18N.Extensions.Autofac/Cosmos/AutofacRegisterExtensions.cs
@@ -28,7 +28,7 @@ public static ContainerBuilder RegisterCosmosLocalization(this ContainerBuilder
             optionAct?.Invoke(options);
 
             var translationManager = new TranslationManager();
-            var translationSetter = translationManager as ITranslationManSetter;
+            var translationSetter = (ITranslationManSetter) translationManager;
 
             foreach (var package in options.TranslationPackages) {
                 var translationPackage = package.Value;
diff --git a/src/Cosmos.I18N.Extensions.Console/Cosmos.I18N.Extensions.Console.csproj b/src/Cosmos.I18N.Extensions.Console/Cosmos.I18N.Extensions.Console.csproj
index 5aa72e0..b886a56 100644
--- a/src/Cosmos.I18N.Extensions.Console/Cosmos.I18N.Extensions.Console.csproj
+++ b/src/Cosmos.I18N.Extensions.Console/Cosmos.I18N.Extensions.Console.csproj
@@ -20,10 +20,7 @@
         <PackageReference Include="AspectCore.Core" Version="2.0.0" />
     </ItemGroup>
 
-    <ItemGroup Condition="'$(TargetFramework)'=='netcoreapp3.1' OR 
-                          '$(TargetFramework)'=='netstandard2.1' OR 
-                          '$(TargetFramework)'=='netstandard2.0' OR 
-                          '$(TargetFramework)'=='net461'">
+    <ItemGroup Condition="'$(TargetFramework)'=='netcoreapp3.1' OR &#xD;&#xA;                          '$(TargetFramework)'=='netstandard2.1' OR &#xD;&#xA;                          '$(TargetFramework)'=='netstandard2.0' OR &#xD;&#xA;                          '$(TargetFramework)'=='net461'">
         <PackageReference Include="AspectCore.Extensions.DependencyInjection" Version="2.0.0" />
     </ItemGroup>
     
diff --git a/src/Cosmos.I18N.Extensions.Console/Cosmos/I18N/Extensions/Console/ConsoleLanguageServiceProvider.cs b/src/Cosmos.I18N.Extensions.Console/Cosmos/I18N/Extensions/Console/ConsoleLanguageServiceProvider.cs
index 20f3a74..28944d7 100644
--- a/src/Cosmos.I18N.Extensions.Console/Cosmos/I18N/Extensions/Console/ConsoleLanguageServiceProvider.cs
+++ b/src/Cosmos.I18N.Extensions.Console/Cosmos/I18N/Extensions/Console/ConsoleLanguageServiceProvider.cs
@@ -11,7 +11,11 @@ public class ConsoleLanguageServiceProvider : ILanguageServiceProvider {
 
         private readonly TranslationProcessor _translationProcessor;
 
-        /// <inheritdoc />
+        /// <summary>
+        /// Create a new instance of <see cref="ConsoleLanguageServiceProvider"/>.
+        /// </summary>
+        /// <param name="manager"></param>
+        /// <param name="processor"></param>
         public ConsoleLanguageServiceProvider(ITranslationManager manager, TranslationProcessor processor) {
             _translationManager = manager ?? throw new ArgumentNullException(nameof(manager));
             _translationProcessor = processor ?? throw new ArgumentNullException(nameof(processor));
diff --git a/src/Cosmos.I18N.Extensions.Console/Cosmos/I18N/Extensions/Console/Core/I18NServiceCollection.cs b/src/Cosmos.I18N.Extensions.Console/Cosmos/I18N/Extensions/Console/Core/I18NServiceCollection.cs
index e79d04a..c11363a 100644
--- a/src/Cosmos.I18N.Extensions.Console/Cosmos/I18N/Extensions/Console/Core/I18NServiceCollection.cs
+++ b/src/Cosmos.I18N.Extensions.Console/Cosmos/I18N/Extensions/Console/Core/I18NServiceCollection.cs
@@ -24,7 +24,7 @@ public class I18NServiceCollection : II18NServiceCollection {
         /// <param name="options"></param>
         public I18NServiceCollection(IServiceCollection services = null, I18NOptions options = null) {
             _services = services ?? new ServiceCollection();
-            _options = options ?? new I18NOptions();
+            _options = I18NOptions.Create(options);
             _translationManager = new TranslationManager();
 
             AfterBuild(UpdateStaticResolver);
@@ -50,7 +50,11 @@ public II18NServiceCollection AddDependency(Action<IServiceCollection> servicesA
             return this;
         }
 
-        /// <inheritdoc />
+        /// <summary>
+        /// Build
+        /// </summary>
+        /// <returns></returns>
+        /// <exception cref="InvalidOperationException"></exception>
         public IServiceProvider Build() {
             if (_hasBuild) {
                 throw new InvalidOperationException("Only can be built once.");
diff --git a/src/Cosmos.I18N.Extensions.Console/Cosmos/I18N/Extensions/Console/GlobalConfigurationExtensions.cs b/src/Cosmos.I18N.Extensions.Console/Cosmos/I18N/Extensions/Console/GlobalConfigurationExtensions.cs
index 9e13706..c550ece 100644
--- a/src/Cosmos.I18N.Extensions.Console/Cosmos/I18N/Extensions/Console/GlobalConfigurationExtensions.cs
+++ b/src/Cosmos.I18N.Extensions.Console/Cosmos/I18N/Extensions/Console/GlobalConfigurationExtensions.cs
@@ -15,8 +15,10 @@ public static class GlobalConfigurationExtensions {
         /// <returns></returns>
         /// <exception cref="ArgumentNullException"></exception>
         public static II18NServiceCollection ToGlobal(this II18NServiceCollection services, Action<I18NOptions> optionsAct) {
-            if (services == null) throw new ArgumentNullException(nameof(services));
-            if (optionsAct == null) throw new ArgumentNullException(nameof(optionsAct));
+            if (services is null)
+                throw new ArgumentNullException(nameof(services));
+            if (optionsAct is null)
+                throw new ArgumentNullException(nameof(optionsAct));
 
             services.AppendOptionsAction(optionsAct);
 
diff --git a/src/Cosmos.I18N/Cosmos/I18N/Configurations/I18NOptions.cs b/src/Cosmos.I18N/Cosmos/I18N/Configurations/I18NOptions.cs
index e3331c2..122512a 100644
--- a/src/Cosmos.I18N/Cosmos/I18N/Configurations/I18NOptions.cs
+++ b/src/Cosmos.I18N/Cosmos/I18N/Configurations/I18NOptions.cs
@@ -60,8 +60,7 @@ public I18NOptions AddPackage(ITranslatePackage package, MergeLevel level = Merg
                 if (__translationPackages.TryGetValue(hashOfPackageKey, out var packageInstance)) {
                     var template = TranslatePackageMerger.Merge(packageInstance, package, level, customMergeProvider);
                     __translationPackages[hashOfPackageKey] = template;
-                }
-                else {
+                } else {
                     AddPackageInternal(package);
                 }
             }
@@ -108,14 +107,12 @@ public I18NOptions AddResource(string packageKey, ITranslateResource resource) {
                 if (TryRegisterLanguageTagOnce(resource.Binding)) {
                     if (__translationPackages.TryGetValue(hashOfPackageKey, out var package)) {
                         package.AddResource(resource);
-                    }
-                    else {
+                    } else {
                         var future = new TranslatePackage(packageKey, _fallbackExperimenter);
                         future.AddResource(resource);
                         AddPackageInternal(future);
                     }
-                }
-                else {
+                } else {
                     throw new InvalidOperationException($"Something broken when add new resource '{resource.Name}'.");
                 }
             }
@@ -271,5 +268,24 @@ public I18NOptions RemoveLanguageTagChangedHandler() {
 
         #endregion
 
+        /// <summary>
+        /// Create
+        /// </summary>
+        /// <param name="optionAct"></param>
+        /// <returns></returns>
+        public static I18NOptions Create(Action<I18NOptions> optionAct = null) {
+            var options = new I18NOptions();
+            optionAct?.Invoke(options);
+            return options;
+        }
+
+        /// <summary>
+        /// Create
+        /// </summary>
+        /// <param name="options"></param>
+        /// <returns></returns>
+        public static I18NOptions Create(I18NOptions options) {
+            return options ?? new I18NOptions();
+        }
     }
 }
\ No newline at end of file