diff --git a/docs/en/Module-Development-Basics.md b/docs/en/Module-Development-Basics.md
index e6f80233e4..4b76465a3e 100644
--- a/docs/en/Module-Development-Basics.md
+++ b/docs/en/Module-Development-Basics.md
@@ -57,7 +57,7 @@ public class BlogModule : AbpModule
 }
 ````
 
-See Configuration (TODO: link) document for more about the configuration system.
+See the [Configuration](Configuration.md) document for more about the configuration system.
 
 #### Pre & Post Configure Services
 
@@ -139,4 +139,4 @@ A depended module may depend on another module, but you only need to define your
 There are **two types of modules.** They don't have any structural difference but categorized by functionality and purpose:
 
 - **Framework modules**: These are **core modules of the framework** like caching, emailing, theming, security, serialization, validation, EF Core integration, MongoDB integration... etc. They do not have application/business functionalities but makes your daily development easier by providing common infrastructure, integration and abstractions.
-- **Application modules**: These modules implement **specific application/business functionalities** like blogging, document management, identity management, tenant management... etc. They generally have their own entities, services, APIs and UI components. See [pre-built application modules](Modules/Index.md).
\ No newline at end of file
+- **Application modules**: These modules implement **specific application/business functionalities** like blogging, document management, identity management, tenant management... etc. They generally have their own entities, services, APIs and UI components. See [pre-built application modules](Modules/Index.md).
diff --git a/framework/src/Volo.Abp.Core/Volo/Abp/Reflection/ReflectionHelper.cs b/framework/src/Volo.Abp.Core/Volo/Abp/Reflection/ReflectionHelper.cs
index fd47d8b859..132c198aa9 100644
--- a/framework/src/Volo.Abp.Core/Volo/Abp/Reflection/ReflectionHelper.cs
+++ b/framework/src/Volo.Abp.Core/Volo/Abp/Reflection/ReflectionHelper.cs
@@ -124,7 +124,7 @@ namespace Volo.Abp.Reflection
                 ? customAttributes.Concat(declaringTypeCustomAttributes).Distinct()
                 : customAttributes;
         }
-        
+
         /// <summary>
         /// Gets value of a property by it's full path from given object
         /// </summary>
@@ -134,7 +134,7 @@ namespace Volo.Abp.Reflection
             var currentType = objectType;
             var objectPath = currentType.FullName;
             var absolutePropertyPath = propertyPath;
-            if (absolutePropertyPath.StartsWith(objectPath))
+             if (objectPath != null && absolutePropertyPath.StartsWith(objectPath))
             {
                 absolutePropertyPath = absolutePropertyPath.Replace(objectPath + ".", "");
             }
@@ -142,8 +142,16 @@ namespace Volo.Abp.Reflection
             foreach (var propertyName in absolutePropertyPath.Split('.'))
             {
                 var property = currentType.GetProperty(propertyName);
-                value = property.GetValue(value, null);
-                currentType = property.PropertyType;
+                if (property != null)
+                {
+                    value = property.GetValue(value, null);
+                    currentType = property.PropertyType;
+                }
+                else
+                {
+                    value = null;
+                    break;
+                }
             }
 
             return value;
diff --git a/framework/src/Volo.Abp.Ddd.Application/Volo/Abp/Application/Services/CrudAppService.cs b/framework/src/Volo.Abp.Ddd.Application/Volo/Abp/Application/Services/CrudAppService.cs
index bf2be8e8f0..fffde41ba7 100644
--- a/framework/src/Volo.Abp.Ddd.Application/Volo/Abp/Application/Services/CrudAppService.cs
+++ b/framework/src/Volo.Abp.Ddd.Application/Volo/Abp/Application/Services/CrudAppService.cs
@@ -57,7 +57,7 @@ namespace Volo.Abp.Application.Services
 
         protected override Task<TEntityDto> MapToGetListOutputDtoAsync(TEntity entity)
         {
-            return base.MapToGetOutputDtoAsync(entity);
+            return MapToGetOutputDtoAsync(entity);
         }
 
         protected override TEntityDto MapToGetListOutputDto(TEntity entity)
diff --git a/framework/test/Volo.Abp.Core.Tests/Volo/Abp/Reflection/ReflectionHelper_Tests.cs b/framework/test/Volo.Abp.Core.Tests/Volo/Abp/Reflection/ReflectionHelper_Tests.cs
index 333ea2e84a..9a621d3e01 100644
--- a/framework/test/Volo.Abp.Core.Tests/Volo/Abp/Reflection/ReflectionHelper_Tests.cs
+++ b/framework/test/Volo.Abp.Core.Tests/Volo/Abp/Reflection/ReflectionHelper_Tests.cs
@@ -1,4 +1,5 @@
-using System.Linq;
+using System;
+using System.Linq;
 using Shouldly;
 using Xunit;
 
@@ -8,6 +9,50 @@ namespace Volo.Abp.Reflection
     {
         //TODO: ...
 
+        class GetValueByPathTestClass
+        {
+            public string Name { get; set; }
+
+            public int Count { get; set; }
+
+            public DateTime Time { get; set; }
+
+            public GetValueByPathTestChildrenClass Children { get; set; }
+        }
+
+        class GetValueByPathTestChildrenClass
+        {
+            public string Name { get; set; }
+
+            public int Count { get; set; }
+        }
+
+        [Fact]
+        public void GetValueByPath_Test()
+        {
+            var value = new GetValueByPathTestClass
+            {
+                Name = "test",
+                Count = 8,
+                Time = DateTime.Parse("2020-01-01"),
+                Children = new GetValueByPathTestChildrenClass
+                {
+                    Name = "test-children",
+                    Count = 9,
+                }
+            };
+
+            ReflectionHelper.GetValueByPath(value, value.GetType(), "Name").ShouldBe("test");
+            ReflectionHelper.GetValueByPath(value, value.GetType(), "Volo.Abp.Reflection.ReflectionHelper_Tests+GetValueByPathTestClass.Name").ShouldBe("test");
+            ReflectionHelper.GetValueByPath(value, value.GetType(), "Count").ShouldBe(8);
+            ReflectionHelper.GetValueByPath(value, value.GetType(), "Time").ShouldBe(DateTime.Parse("2020-01-01"));
+            ReflectionHelper.GetValueByPath(value, value.GetType(), "Children.Name").ShouldBe("test-children");
+            ReflectionHelper.GetValueByPath(value, value.GetType(), "Children.Count").ShouldBe(9);
+            ReflectionHelper.GetValueByPath(value, value.GetType(), "Volo.Abp.Reflection.ReflectionHelper_Tests+GetValueByPathTestClass.Children.Name").ShouldBe("test-children");
+
+            ReflectionHelper.GetValueByPath(value, value.GetType(), "Children.NotExist").ShouldBeNull();
+            ReflectionHelper.GetValueByPath(value, value.GetType(), "NotExist").ShouldBeNull();
+        }
 
         [Fact]
         public void GetPublicConstantsRecursively_Test()
@@ -99,4 +144,4 @@ namespace Volo.Abp.Reflection
         }
     }
 
-}
\ No newline at end of file
+}
diff --git a/modules/identity/src/Volo.Abp.Identity.Application.Contracts/Volo/Abp/Identity/IIdentityUserAppService.cs b/modules/identity/src/Volo.Abp.Identity.Application.Contracts/Volo/Abp/Identity/IIdentityUserAppService.cs
index 97f443f3b6..db6cbdfe38 100644
--- a/modules/identity/src/Volo.Abp.Identity.Application.Contracts/Volo/Abp/Identity/IIdentityUserAppService.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Application.Contracts/Volo/Abp/Identity/IIdentityUserAppService.cs
@@ -19,7 +19,7 @@ namespace Volo.Abp.Identity
 
         Task UpdateRolesAsync(Guid id, IdentityUserUpdateRolesDto input);
 
-        Task<IdentityUserDto> FindByUsernameAsync(string username);
+        Task<IdentityUserDto> FindByUsernameAsync(string userName);
 
         Task<IdentityUserDto> FindByEmailAsync(string email);
     }
diff --git a/modules/identity/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserAppService.cs b/modules/identity/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserAppService.cs
index 070a452218..acd573f916 100644
--- a/modules/identity/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserAppService.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserAppService.cs
@@ -135,10 +135,10 @@ namespace Volo.Abp.Identity
         }
 
         [Authorize(IdentityPermissions.Users.Default)]
-        public virtual async Task<IdentityUserDto> FindByUsernameAsync(string username)
+        public virtual async Task<IdentityUserDto> FindByUsernameAsync(string userName)
         {
             return ObjectMapper.Map<IdentityUser, IdentityUserDto>(
-                await UserManager.FindByNameAsync(username)
+                await UserManager.FindByNameAsync(userName)
             );
         }
 
diff --git a/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/en.json b/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/en.json
index 63ad1f2c3e..c1b4d42a04 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/en.json
+++ b/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/en.json
@@ -79,8 +79,8 @@
     "Permission:UserManagement": "User management",
     "Permission:UserLookup": "User lookup",
     "Feature:IdentityGroup": "Identity",
-    "Feature:TwoFactor": "Two Factor",
-    "Feature:TwoFactorDescription": "Two Factor",
+    "Feature:TwoFactor": "Two factor behaviour",
+    "Feature:TwoFactorDescription": "Set two factor behaviour. Optional values: Optional,Disabled,Forced",
     "Feature:TwoFactor.Optional": "Optional",
     "Feature:TwoFactor.Disabled": "Disabled",
     "Feature:TwoFactor.Forced": "Forced",
diff --git a/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/tr.json b/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/tr.json
index 9bdecca7b2..09707f73c2 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/tr.json
+++ b/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/tr.json
@@ -78,10 +78,10 @@
     "Permission:UserLookup": "Kullanıcı sorgulama",
     "Feature:IdentityGroup": "Kimlik",
     "Feature:TwoFactor": "İki faktörlü kimlik doğrulama",
-    "Feature:TwoFactorDescription": "İki faktörlü kimlik doğrulama",
+    "Feature:TwoFactorDescription": "İki faktörlü kimlik doğrulamanın talep edileceği durumu seçin",
     "Feature:TwoFactor.Optional": "İsteğe bağlı",
-    "Feature:TwoFactor.Disabled": "Devre dışı",
-    "Feature:TwoFactor.Forced": "Zorunlu",
+    "Feature:TwoFactor.Disabled": "Asla",
+    "Feature:TwoFactor.Forced": "Her zaman",
     "DisplayName:Abp.Identity.Password.RequiredLength": "Uzunluk gerekli",
     "DisplayName:Abp.Identity.Password.RequiredUniqueChars": "Tekil karakter gerekli",
     "DisplayName:Abp.Identity.Password.RequireNonAlphanumeric": "Alfasayısal olmayan karakter gerekli",
diff --git a/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/zh-Hans.json b/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/zh-Hans.json
index a9bce46cf9..7b084c473e 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/zh-Hans.json
+++ b/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/zh-Hans.json
@@ -79,8 +79,8 @@
     "Permission:UserManagement": "用户管理",
     "Permission:UserLookup": "用户查询",
     "Feature:IdentityGroup": "身份标识",
-    "Feature:TwoFactor": "双因素身份验证",
-    "Feature:TwoFactorDescription": "双因素身份验证",
+    "Feature:TwoFactor": "双因素身份验证行为",
+    "Feature:TwoFactorDescription": "设置双因素身份验证行为. 可选值:可选,禁用,强制启用",
     "Feature:TwoFactor.Optional": "可选",
     "Feature:TwoFactor.Disabled": "禁用",
     "Feature:TwoFactor.Forced": "强制启用",
diff --git a/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/zh-Hant.json b/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/zh-Hant.json
index dd8c9e0a17..5a4c96d111 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/zh-Hant.json
+++ b/modules/identity/src/Volo.Abp.Identity.Domain.Shared/Volo/Abp/Identity/Localization/zh-Hant.json
@@ -79,8 +79,8 @@
     "Permission:UserManagement": "使用者管理",
     "Permission:UserLookup": "使用者查詢",
     "Feature:IdentityGroup": "身份識別",
-    "Feature:TwoFactor": "雙因素",
-    "Feature:TwoFactorDescription": "雙因素",
+    "Feature:TwoFactor": "雙因素身份驗證行為",
+    "Feature:TwoFactorDescription": "設置雙因素身份驗證行為. 可選值:可選,禁用,強制啟用",
     "Feature:TwoFactor.Optional": "選用",
     "Feature:TwoFactor.Disabled": "關閉",
     "Feature:TwoFactor.Forced": "強制啟用",