diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Carousel/AbpCarouselTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Carousel/AbpCarouselTagHelperService.cs
index 558873a067..749218cab0 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Carousel/AbpCarouselTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Carousel/AbpCarouselTagHelperService.cs
@@ -72,7 +72,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Carousel
 
         protected virtual void SetIndicators(TagHelperContext context, TagHelperOutput output, List<CarouselItem> itemList)
         {
-            if (!TagHelper.Indicators??false)
+            if (!TagHelper.Indicators ?? false)
             {
                 return;
             }
@@ -83,9 +83,9 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Carousel
             {
                 html.AppendLine(
                     "<li " +
-                    "data-target=\"#"+TagHelper.Id+"\"" +
-                    " data-slide-to=\""+i+"\"" +
-                    (itemList[i].Active?" class=\"active\">":"") +
+                    "data-target=\"#" + TagHelper.Id + "\"" +
+                    " data-slide-to=\"" + i + "\"" +
+                    (itemList[i].Active ? " class=\"active\">" : "") +
                     "</li>");
             }
 
@@ -95,7 +95,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Carousel
 
         protected virtual void SetOneItemAsActive(TagHelperContext context, TagHelperOutput output, List<CarouselItem> itemList)
         {
-            if (!itemList.Any(it=> it.Active) && itemList.Count > 0)
+            if (!itemList.Any(it => it.Active) && itemList.Count > 0)
             {
                 itemList.FirstOrDefault().Active = true;
             }
@@ -117,7 +117,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Carousel
 
         protected virtual void SetFadeAnimation(TagHelperContext context, TagHelperOutput output)
         {
-            if (TagHelper.Crossfade??false)
+            if (TagHelper.Crossfade ?? false)
             {
                 output.Attributes.AddClass("carousel-fade");
             }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownDividerTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownDividerTagHelperService.cs
index 7492d461c4..4e420f538b 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownDividerTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownDividerTagHelperService.cs
@@ -11,6 +11,5 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Dropdown
             output.Attributes.AddClass("dropdown-divider");
             output.TagMode = TagMode.StartTagAndEndTag;
         }
-        
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownHeaderTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownHeaderTagHelperService.cs
index c095ca062e..73157f45cc 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownHeaderTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownHeaderTagHelperService.cs
@@ -11,6 +11,5 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Dropdown
             output.Attributes.AddClass("dropdown-header");
             output.TagMode = TagMode.StartTagAndEndTag;
         }
-        
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownMenuTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownMenuTagHelperService.cs
index f48a1eaf02..32156cd175 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownMenuTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownMenuTagHelperService.cs
@@ -25,6 +25,5 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Dropdown
                     return;
             }
         }
-
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownTagHelperService.cs
index fc08821d66..a9d234fc89 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Dropdown/AbpDropdownTagHelperService.cs
@@ -38,6 +38,5 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Dropdown
                     return;
             }
         }
-
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Figure/AbpFigureCaptionTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Figure/AbpFigureCaptionTagHelperService.cs
index 6707d34522..f14a4a18fd 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Figure/AbpFigureCaptionTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Figure/AbpFigureCaptionTagHelperService.cs
@@ -10,6 +10,5 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Figure
             output.TagName = "figcaption";
             output.Attributes.AddClass("figure-caption");
         }
-        
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Figure/AbpFigureImageTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Figure/AbpFigureImageTagHelperService.cs
index aa8d9ff5cc..51237fe297 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Figure/AbpFigureImageTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Figure/AbpFigureImageTagHelperService.cs
@@ -9,6 +9,5 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Figure
         {
             output.Attributes.AddClass("figure-img");
         }
-        
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Figure/AbpFigureTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Figure/AbpFigureTagHelperService.cs
index 2b83662751..7fe094f94e 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Figure/AbpFigureTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Figure/AbpFigureTagHelperService.cs
@@ -10,6 +10,5 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Figure
             output.TagName = "figure";
             output.Attributes.AddClass("figure");
         }
-        
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Grid/AbpColBreakTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Grid/AbpColBreakTagHelperService.cs
index ccbb4e638a..b483f275b2 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Grid/AbpColBreakTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Grid/AbpColBreakTagHelperService.cs
@@ -11,6 +11,5 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Grid
             output.Attributes.AddClass("w-100");
             output.TagMode = TagMode.StartTagAndEndTag;
         }
-
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Image/AbpImageTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Image/AbpImageTagHelperService.cs
index f834f48a03..c03eee480e 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Image/AbpImageTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Image/AbpImageTagHelperService.cs
@@ -5,7 +5,6 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Image
 {
     public class AbpImageTagHelperService : AbpTagHelperService<AbpImageTagHelper>
     {
-
         public override void Process(TagHelperContext context, TagHelperOutput output)
         {
             output.TagName = "img";
@@ -65,6 +64,5 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Image
         {
             output.Attributes.Add("alt",TagHelper.Alt);
         }
-
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Label/AbpLabelTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Label/AbpLabelTagHelperService.cs
index 24a094732a..bca82d56d5 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Label/AbpLabelTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Label/AbpLabelTagHelperService.cs
@@ -8,6 +8,5 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Label
         {
             //TODO: fill
         }
-        
     }
 }
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/ListGroup/AbpListGroupTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/ListGroup/AbpListGroupTagHelperService.cs
index 96bc6cdf01..92fb22c27c 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/ListGroup/AbpListGroupTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/ListGroup/AbpListGroupTagHelperService.cs
@@ -15,6 +15,5 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.ListGroup
                 output.Attributes.AddClass("list-group-flush");
             }
         }
-
     }
 }
\ No newline at end of file