diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Bootstrap/BootstrapScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Bootstrap/BootstrapScriptContributor.cs
index 0a714270ea..bfe5ecebb8 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Bootstrap/BootstrapScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Bootstrap/BootstrapScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.JQuery;
 using Volo.Abp.Modularity;
 
@@ -9,7 +10,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Bootstrap
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/bootstrap/js/bootstrap.bundle.js");
+            context.Files.AddIfNotContains("/libs/bootstrap/js/bootstrap.bundle.js");
         }
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Bootstrap/BootstrapStyleContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Bootstrap/BootstrapStyleContributor.cs
index 4714c374ee..c75f899315 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Bootstrap/BootstrapStyleContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Bootstrap/BootstrapStyleContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 
 namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Bootstrap
 {
@@ -6,7 +7,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Bootstrap
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/bootstrap/css/bootstrap.css");
+            context.Files.AddIfNotContains("/libs/bootstrap/css/bootstrap.css");
         }
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Codemirror/CodemirrorScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Codemirror/CodemirrorScriptContributor.cs
index 70b9a11289..bbd810943b 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Codemirror/CodemirrorScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Codemirror/CodemirrorScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.Core;
 using Volo.Abp.Modularity;
 
@@ -9,7 +10,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Codemirror
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/codemirror/codemirror.js");
+            context.Files.AddIfNotContains("/libs/codemirror/codemirror.js");
         }
     }
 }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Codemirror/CodemirrorStyleContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Codemirror/CodemirrorStyleContributor.cs
index 7b8bcbd95f..b3eebe1248 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Codemirror/CodemirrorStyleContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Codemirror/CodemirrorStyleContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 
 namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Codemirror
 {
@@ -6,7 +7,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Codemirror
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/codemirror/codemirror.css");
+            context.Files.AddIfNotContains("/libs/codemirror/codemirror.css");
         }
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Core/CoreScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Core/CoreScriptContributor.cs
index 728f66148a..7373dd151c 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Core/CoreScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Core/CoreScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 
 namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Core
 {
@@ -6,7 +7,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Core
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/abp/core/abp.js");
+            context.Files.AddIfNotContains("/libs/abp/core/abp.js");
         }
     }
 }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/DatatablesNet/DatatablesNetScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/DatatablesNet/DatatablesNetScriptContributor.cs
index a6652d8969..1a484159fc 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/DatatablesNet/DatatablesNetScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/DatatablesNet/DatatablesNetScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.JQuery;
 using Volo.Abp.Modularity;
 
@@ -9,7 +10,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.DatatablesNet
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/datatables.net/js/jquery.dataTables.js");
+            context.Files.AddIfNotContains("/libs/datatables.net/js/jquery.dataTables.js");
         }
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/DatatablesNetBs4/DatatablesNetBs4ScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/DatatablesNetBs4/DatatablesNetBs4ScriptContributor.cs
index 1060f8e6e6..bce344172b 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/DatatablesNetBs4/DatatablesNetBs4ScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/DatatablesNetBs4/DatatablesNetBs4ScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.Bootstrap;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.DatatablesNet;
 using Volo.Abp.Modularity;
@@ -11,7 +12,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.DatatablesNetBs4
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/datatables.net-bs4/js/dataTables.bootstrap4.js");
+            context.Files.AddIfNotContains("/libs/datatables.net-bs4/js/dataTables.bootstrap4.js");
         }
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/DatatablesNetBs4/DatatablesNetBs4StyleContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/DatatablesNetBs4/DatatablesNetBs4StyleContributor.cs
index e29127d58c..9ab5dfad7b 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/DatatablesNetBs4/DatatablesNetBs4StyleContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/DatatablesNetBs4/DatatablesNetBs4StyleContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.Bootstrap;
 using Volo.Abp.Modularity;
 
@@ -9,7 +10,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.DatatablesNetBs4
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/datatables.net-bs4/css/dataTables.bootstrap4.css");
+            context.Files.AddIfNotContains("/libs/datatables.net-bs4/css/dataTables.bootstrap4.css");
         }
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/FontAwesome/BootstrapStyleBundleContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/FontAwesome/FontAwesomeStyleContributor.cs
similarity index 58%
rename from src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/FontAwesome/BootstrapStyleBundleContributor.cs
rename to src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/FontAwesome/FontAwesomeStyleContributor.cs
index 362f8b51f5..7f01e15859 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/FontAwesome/BootstrapStyleBundleContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/FontAwesome/FontAwesomeStyleContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 
 namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.FontAwesome
 {
@@ -6,7 +7,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.FontAwesome
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/font-awesome/css/font-awesome.css");
+            context.Files.AddIfNotContains("/libs/font-awesome/css/font-awesome.css");
         }
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/HighlightJs/HighlightJsScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/HighlightJs/HighlightJsScriptContributor.cs
index bd71de0010..e135aba3a0 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/HighlightJs/HighlightJsScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/HighlightJs/HighlightJsScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.Core;
 using Volo.Abp.Modularity;
 
@@ -9,14 +10,14 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.HighlightJs
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/highlight.js/highlight.js");
+            context.Files.AddIfNotContains("/libs/highlight.js/highlight.js");
 
             //TODO: Add related languages by configuration (these can be default!)
-            context.Files.Add("/libs/highlight.js/languages/cs.js");
-            context.Files.Add("/libs/highlight.js/languages/css.js");
-            context.Files.Add("/libs/highlight.js/languages/javascript.js");
-            context.Files.Add("/libs/highlight.js/languages/json.js");
-            context.Files.Add("/libs/highlight.js/languages/xml.js");
+            context.Files.AddIfNotContains("/libs/highlight.js/languages/cs.js");
+            context.Files.AddIfNotContains("/libs/highlight.js/languages/css.js");
+            context.Files.AddIfNotContains("/libs/highlight.js/languages/javascript.js");
+            context.Files.AddIfNotContains("/libs/highlight.js/languages/json.js");
+            context.Files.AddIfNotContains("/libs/highlight.js/languages/xml.js");
         }
     }
 }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/HighlightJs/HighlightJsStyleContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/HighlightJs/HighlightJsStyleContributor.cs
index 89bc81fc02..61df3edbc4 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/HighlightJs/HighlightJsStyleContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/HighlightJs/HighlightJsStyleContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 
 namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.HighlightJs
 {
@@ -7,7 +8,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.HighlightJs
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
             //TODO: Make this configurable
-            context.Files.Add("/libs/highlight.js/styles/github.css");
+            context.Files.AddIfNotContains("/libs/highlight.js/styles/github.css");
         }
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQuery/JQueryScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQuery/JQueryScriptContributor.cs
index 7fe8e9e946..97556bb8a2 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQuery/JQueryScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQuery/JQueryScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.Core;
 using Volo.Abp.Modularity;
 
@@ -9,8 +10,8 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.JQuery
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/jquery/jquery.js");
-            context.Files.Add("/libs/abp/jquery/abp.jquery.js");
+            context.Files.AddIfNotContains("/libs/jquery/jquery.js");
+            context.Files.AddIfNotContains("/libs/abp/jquery/abp.jquery.js");
         }
     }
 }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQueryForm/JQueryFormScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQueryForm/JQueryFormScriptContributor.cs
index b0fd249e36..ae987fa3f7 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQueryForm/JQueryFormScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQueryForm/JQueryFormScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.JQuery;
 using Volo.Abp.Modularity;
 
@@ -9,7 +10,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.JQueryForm
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/jquery-form/jquery.form.min.js");
+            context.Files.AddIfNotContains("/libs/jquery-form/jquery.form.min.js");
         }
     }
 }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQueryValidation/JQueryValidationScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQueryValidation/JQueryValidationScriptContributor.cs
index 3282bb396b..d3c8c7c0f5 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQueryValidation/JQueryValidationScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQueryValidation/JQueryValidationScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.JQuery;
 using Volo.Abp.Modularity;
 
@@ -9,7 +10,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.JQueryValidation
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/jquery-validation/jquery.validate.js");
+            context.Files.AddIfNotContains("/libs/jquery-validation/jquery.validate.js");
         }
     }
 }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQueryValidationUnobtrusive/JQueryValidationUnobtrusiveScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQueryValidationUnobtrusive/JQueryValidationUnobtrusiveScriptContributor.cs
index 116a36dc34..f84319d248 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQueryValidationUnobtrusive/JQueryValidationUnobtrusiveScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/JQueryValidationUnobtrusive/JQueryValidationUnobtrusiveScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.JQueryValidation;
 using Volo.Abp.Modularity;
 
@@ -9,7 +10,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.JQueryValidationUnobtrusive
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/jquery-validation-unobtrusive/jquery.validate.unobtrusive.js");
+            context.Files.AddIfNotContains("/libs/jquery-validation-unobtrusive/jquery.validate.unobtrusive.js");
         }
     }
 }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Lodash/LodashScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Lodash/LodashScriptContributor.cs
index cc308e87aa..3d24671fc6 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Lodash/LodashScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Lodash/LodashScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.Core;
 using Volo.Abp.Modularity;
 
@@ -9,7 +10,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Lodash
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/loadash/lodash.min.js");
+            context.Files.AddIfNotContains("/libs/loadash/lodash.min.js");
         }
     }
 }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/MarkdownIt/MarkdownItScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/MarkdownIt/MarkdownItScriptContributor.cs
index 609f74b9b6..db1810fdb2 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/MarkdownIt/MarkdownItScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/MarkdownIt/MarkdownItScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.Core;
 using Volo.Abp.Modularity;
 
@@ -9,7 +10,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.MarkdownIt
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/markdown-it/markdown-it.min.js");
+            context.Files.AddIfNotContains("/libs/markdown-it/markdown-it.min.js");
         }
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Select2/Select2ScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Select2/Select2ScriptContributor.cs
index 6c4606d08e..1e5f138f97 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Select2/Select2ScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Select2/Select2ScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.Core;
 using Volo.Abp.Modularity;
 
@@ -10,7 +11,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Select2
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
             //TODO: Add select2.full.min.js or localize!
-            context.Files.Add("/libs/select2/js/select2.min.js");
+            context.Files.AddIfNotContains("/libs/select2/js/select2.min.js");
         }
     }
 }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Select2/Select2StyleContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Select2/Select2StyleContributor.cs
index 36b942a2c6..aaf67055e4 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Select2/Select2StyleContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Select2/Select2StyleContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 
 namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Select2
 {
@@ -6,7 +7,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Select2
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/select2/css/select2.min.css");
+            context.Files.AddIfNotContains("/libs/select2/css/select2.min.css");
         }
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/SweetAlert/SweetalertScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/SweetAlert/SweetalertScriptContributor.cs
index e75dc1ca90..eefc2e21a8 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/SweetAlert/SweetalertScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/SweetAlert/SweetalertScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.Core;
 using Volo.Abp.Modularity;
 
@@ -9,7 +10,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.SweetAlert
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/sweetalert/sweetalert.min.js");
+            context.Files.AddIfNotContains("/libs/sweetalert/sweetalert.min.js");
         }
     }
 }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Timeago/TimeagoScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Timeago/TimeagoScriptContributor.cs
index a847cac78b..df9ac55c42 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Timeago/TimeagoScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Timeago/TimeagoScriptContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.JQuery;
 using Volo.Abp.Modularity;
 
@@ -9,7 +10,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Timeago
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/timeago/jquery.timeago.js");
+            context.Files.AddIfNotContains("/libs/timeago/jquery.timeago.js");
         }
     }
 }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Toastr/ToastrScriptBundleContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Toastr/ToastrScriptBundleContributor.cs
index 5f0fab497c..1a89adbfae 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Toastr/ToastrScriptBundleContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Toastr/ToastrScriptBundleContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 using Volo.Abp.AspNetCore.Mvc.UI.Packages.JQuery;
 using Volo.Abp.Modularity;
 
@@ -9,7 +10,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Toastr
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/toastr/toastr.min.js");
+            context.Files.AddIfNotContains("/libs/toastr/toastr.min.js");
         }
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Toastr/ToastrStyleBundleContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Toastr/ToastrStyleBundleContributor.cs
index bddab43863..507d891f20 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Toastr/ToastrStyleBundleContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Packages/Volo/Abp/AspNetCore/Mvc/UI/Packages/Toastr/ToastrStyleBundleContributor.cs
@@ -1,4 +1,5 @@
-using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
+using System.Collections.Generic;
+using Volo.Abp.AspNetCore.Mvc.UI.Bundling;
 
 namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Toastr
 {
@@ -6,7 +7,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Packages.Toastr
     {
         public override void ConfigureBundle(BundleConfigurationContext context)
         {
-            context.Files.Add("/libs/toastr/toastr.min.css");
+            context.Files.AddIfNotContains("/libs/toastr/toastr.min.css");
         }
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared/Bundling/SharedThemeGlobalScriptContributor.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared/Bundling/SharedThemeGlobalScriptContributor.cs
index bf2f574963..036cefe200 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared/Bundling/SharedThemeGlobalScriptContributor.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared/Bundling/SharedThemeGlobalScriptContributor.cs
@@ -23,8 +23,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared.Bundling
         typeof(SweetalertScriptContributor),
         typeof(ToastrScriptBundleContributor),
         typeof(TimeagoScriptContributor),
-        typeof(Select2ScriptContributor)
-    )]
+        typeof(Select2ScriptContributor))]
     public class SharedThemeGlobalScriptContributor : BundleContributor
     {
         public override void ConfigureBundle(BundleConfigurationContext context)