diff --git a/framework/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared.Demo/Views/Components/Themes/Shared/TagHelpers/AbpComponentDemoSectionTagHelper.cs b/framework/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared.Demo/Views/Components/Themes/Shared/TagHelpers/AbpComponentDemoSectionTagHelper.cs
index 328024cc2b..beaa8126fc 100644
--- a/framework/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared.Demo/Views/Components/Themes/Shared/TagHelpers/AbpComponentDemoSectionTagHelper.cs
+++ b/framework/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared.Demo/Views/Components/Themes/Shared/TagHelpers/AbpComponentDemoSectionTagHelper.cs
@@ -120,9 +120,9 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared.Demo.Views.Components.Themes.S
 
                     return sourceBuilder.ToString();
                 }
-                else if (sourceBuilder != null)
+                else 
                 {
-                    sourceBuilder.AppendLine(line);
+                    sourceBuilder?.AppendLine(line);
                 }
             }
 
diff --git a/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/QuartzBackgroundWorkerAdapter.cs b/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/QuartzBackgroundWorkerAdapter.cs
index 0b75f389fe..a37807e473 100644
--- a/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/QuartzBackgroundWorkerAdapter.cs
+++ b/framework/src/Volo.Abp.BackgroundWorkers.Quartz/Volo/Abp/BackgroundWorkers/Quartz/QuartzBackgroundWorkerAdapter.cs
@@ -75,10 +75,7 @@ namespace Volo.Abp.BackgroundWorkers.Quartz
                 }
                 case PeriodicBackgroundWorkerBase syncWorker:
                 {
-                    if (_doWorkMethod != null)
-                    {
-                        _doWorkMethod.Invoke(syncWorker, new object[] {workerContext});
-                    }
+                    _doWorkMethod?.Invoke(syncWorker, new object[] {workerContext});
 
                     break;
                 }
diff --git a/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/Bundling/BundlerBase.cs b/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/Bundling/BundlerBase.cs
index 97ef628d5a..074b7f6980 100644
--- a/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/Bundling/BundlerBase.cs
+++ b/framework/src/Volo.Abp.Cli.Core/Volo/Abp/Cli/Bundling/BundlerBase.cs
@@ -75,7 +75,7 @@ namespace Volo.Abp.Cli.Bundling
                     var pathFragments = definition.Source.Split('/').ToList();
                     var basePath = $"{pathFragments[0]}/{pathFragments[1]}";
                     var node = staticAssetsDefinitions.SelectSingleNode($"//ContentRoot[@BasePath='{basePath}']");
-                    if (node == null || node.Attributes == null)
+                    if (node?.Attributes == null)
                     {
                         throw new AbpException("Not found: " + definition.Source);
                     }
diff --git a/framework/src/Volo.Abp.Threading/Volo/Abp/Threading/AmbientDataContextAmbientScopeProvider.cs b/framework/src/Volo.Abp.Threading/Volo/Abp/Threading/AmbientDataContextAmbientScopeProvider.cs
index 822361638e..1d83278bf1 100644
--- a/framework/src/Volo.Abp.Threading/Volo/Abp/Threading/AmbientDataContextAmbientScopeProvider.cs
+++ b/framework/src/Volo.Abp.Threading/Volo/Abp/Threading/AmbientDataContextAmbientScopeProvider.cs
@@ -62,8 +62,7 @@ namespace Volo.Abp.Threading
 
         private ScopeItem GetCurrentItem(string contextKey)
         {
-            var objKey = _dataContext.GetData(contextKey) as string;
-            return objKey != null ? ScopeDictionary.GetOrDefault(objKey) : null;
+            return _dataContext.GetData(contextKey) is string objKey ? ScopeDictionary.GetOrDefault(objKey) : null;
         }
 
         private class ScopeItem
diff --git a/framework/test/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo.Tests/Volo/Abp/AspNetCore/Mvc/UI/Bootstrap/Demo/AbpAspNetCoreMvcUiBootstrapDemoTestBase.cs b/framework/test/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo.Tests/Volo/Abp/AspNetCore/Mvc/UI/Bootstrap/Demo/AbpAspNetCoreMvcUiBootstrapDemoTestBase.cs
index 15473df986..d7a8a88c2a 100644
--- a/framework/test/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo.Tests/Volo/Abp/AspNetCore/Mvc/UI/Bootstrap/Demo/AbpAspNetCoreMvcUiBootstrapDemoTestBase.cs
+++ b/framework/test/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo.Tests/Volo/Abp/AspNetCore/Mvc/UI/Bootstrap/Demo/AbpAspNetCoreMvcUiBootstrapDemoTestBase.cs
@@ -18,10 +18,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo
         {
             return CalculateContentRootPath(
                 "Volo.Abp.sln",
-                string.Format(
-                    "test{0}Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo",
-                    Path.DirectorySeparatorChar
-                )
+                $"test{Path.DirectorySeparatorChar}Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.Demo"
             );
         }