diff --git a/framework/src/Volo.Abp.Dapper/Volo.Abp.Dapper.csproj b/framework/src/Volo.Abp.Dapper/Volo.Abp.Dapper.csproj
index f7b9d76169e..d077d859e18 100644
--- a/framework/src/Volo.Abp.Dapper/Volo.Abp.Dapper.csproj
+++ b/framework/src/Volo.Abp.Dapper/Volo.Abp.Dapper.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>Volo.Abp.Dapper</AssemblyName>
     <PackageId>Volo.Abp.Dapper</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
diff --git a/framework/src/Volo.Abp.EntityFrameworkCore.MySQL/Volo.Abp.EntityFrameworkCore.MySQL.csproj b/framework/src/Volo.Abp.EntityFrameworkCore.MySQL/Volo.Abp.EntityFrameworkCore.MySQL.csproj
index b63a2ae7cb3..10f1f4e0704 100644
--- a/framework/src/Volo.Abp.EntityFrameworkCore.MySQL/Volo.Abp.EntityFrameworkCore.MySQL.csproj
+++ b/framework/src/Volo.Abp.EntityFrameworkCore.MySQL/Volo.Abp.EntityFrameworkCore.MySQL.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\common.props" />
    
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>Volo.Abp.EntityFrameworkCore.MySQL</AssemblyName>
     <PackageId>Volo.Abp.EntityFrameworkCore.MySQL</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
@@ -18,7 +18,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="3.0.1" />
+    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="3.1.0" />
   </ItemGroup>
    
 </Project>
diff --git a/framework/src/Volo.Abp.EntityFrameworkCore.PostgreSql/Volo.Abp.EntityFrameworkCore.PostgreSql.csproj b/framework/src/Volo.Abp.EntityFrameworkCore.PostgreSql/Volo.Abp.EntityFrameworkCore.PostgreSql.csproj
index 0154d1b773e..13e41972092 100644
--- a/framework/src/Volo.Abp.EntityFrameworkCore.PostgreSql/Volo.Abp.EntityFrameworkCore.PostgreSql.csproj
+++ b/framework/src/Volo.Abp.EntityFrameworkCore.PostgreSql/Volo.Abp.EntityFrameworkCore.PostgreSql.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>Volo.Abp.EntityFrameworkCore.PostgreSql</AssemblyName>
     <PackageId>Volo.Abp.EntityFrameworkCore.PostgreSql</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
diff --git a/framework/src/Volo.Abp.EntityFrameworkCore.SqlServer/Volo.Abp.EntityFrameworkCore.SqlServer.csproj b/framework/src/Volo.Abp.EntityFrameworkCore.SqlServer/Volo.Abp.EntityFrameworkCore.SqlServer.csproj
index d0d338be9d8..3e3172003cc 100644
--- a/framework/src/Volo.Abp.EntityFrameworkCore.SqlServer/Volo.Abp.EntityFrameworkCore.SqlServer.csproj
+++ b/framework/src/Volo.Abp.EntityFrameworkCore.SqlServer/Volo.Abp.EntityFrameworkCore.SqlServer.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>Volo.Abp.EntityFrameworkCore.SqlServer</AssemblyName>
     <PackageId>Volo.Abp.EntityFrameworkCore.SqlServer</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
diff --git a/framework/src/Volo.Abp.EntityFrameworkCore.Sqlite/Volo.Abp.EntityFrameworkCore.Sqlite.csproj b/framework/src/Volo.Abp.EntityFrameworkCore.Sqlite/Volo.Abp.EntityFrameworkCore.Sqlite.csproj
index d3c5313898f..2ac575f23a6 100644
--- a/framework/src/Volo.Abp.EntityFrameworkCore.Sqlite/Volo.Abp.EntityFrameworkCore.Sqlite.csproj
+++ b/framework/src/Volo.Abp.EntityFrameworkCore.Sqlite/Volo.Abp.EntityFrameworkCore.Sqlite.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\common.props" />
   
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>Volo.Abp.EntityFrameworkCore.Sqlite</AssemblyName>
     <PackageId>Volo.Abp.EntityFrameworkCore.Sqlite</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
diff --git a/framework/src/Volo.Abp.EntityFrameworkCore/Volo.Abp.EntityFrameworkCore.csproj b/framework/src/Volo.Abp.EntityFrameworkCore/Volo.Abp.EntityFrameworkCore.csproj
index 3e83001eb24..0640cf10b92 100644
--- a/framework/src/Volo.Abp.EntityFrameworkCore/Volo.Abp.EntityFrameworkCore.csproj
+++ b/framework/src/Volo.Abp.EntityFrameworkCore/Volo.Abp.EntityFrameworkCore.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>Volo.Abp.EntityFrameworkCore</AssemblyName>
     <PackageId>Volo.Abp.EntityFrameworkCore</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
diff --git a/modules/audit-logging/src/Volo.Abp.AuditLogging.EntityFrameworkCore/Volo.Abp.AuditLogging.EntityFrameworkCore.csproj b/modules/audit-logging/src/Volo.Abp.AuditLogging.EntityFrameworkCore/Volo.Abp.AuditLogging.EntityFrameworkCore.csproj
index 93422d8f3f6..ff72eb23dab 100644
--- a/modules/audit-logging/src/Volo.Abp.AuditLogging.EntityFrameworkCore/Volo.Abp.AuditLogging.EntityFrameworkCore.csproj
+++ b/modules/audit-logging/src/Volo.Abp.AuditLogging.EntityFrameworkCore/Volo.Abp.AuditLogging.EntityFrameworkCore.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <RootNamespace />
   </PropertyGroup>
 
diff --git a/modules/background-jobs/src/Volo.Abp.BackgroundJobs.EntityFrameworkCore/Volo.Abp.BackgroundJobs.EntityFrameworkCore.csproj b/modules/background-jobs/src/Volo.Abp.BackgroundJobs.EntityFrameworkCore/Volo.Abp.BackgroundJobs.EntityFrameworkCore.csproj
index eb929726750..1b3ed125245 100644
--- a/modules/background-jobs/src/Volo.Abp.BackgroundJobs.EntityFrameworkCore/Volo.Abp.BackgroundJobs.EntityFrameworkCore.csproj
+++ b/modules/background-jobs/src/Volo.Abp.BackgroundJobs.EntityFrameworkCore/Volo.Abp.BackgroundJobs.EntityFrameworkCore.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <RootNamespace />
   </PropertyGroup>
 
diff --git a/modules/blogging/app/Volo.BloggingTestApp.EntityFrameworkCore/Volo.BloggingTestApp.EntityFrameworkCore.csproj b/modules/blogging/app/Volo.BloggingTestApp.EntityFrameworkCore/Volo.BloggingTestApp.EntityFrameworkCore.csproj
index 27fa209d2c3..3f100043ee6 100644
--- a/modules/blogging/app/Volo.BloggingTestApp.EntityFrameworkCore/Volo.BloggingTestApp.EntityFrameworkCore.csproj
+++ b/modules/blogging/app/Volo.BloggingTestApp.EntityFrameworkCore/Volo.BloggingTestApp.EntityFrameworkCore.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/modules/blogging/src/Volo.Blogging.EntityFrameworkCore/Volo.Blogging.EntityFrameworkCore.csproj b/modules/blogging/src/Volo.Blogging.EntityFrameworkCore/Volo.Blogging.EntityFrameworkCore.csproj
index 122385c76f0..77f25274f04 100644
--- a/modules/blogging/src/Volo.Blogging.EntityFrameworkCore/Volo.Blogging.EntityFrameworkCore.csproj
+++ b/modules/blogging/src/Volo.Blogging.EntityFrameworkCore/Volo.Blogging.EntityFrameworkCore.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>Volo.Blogging.EntityFrameworkCore</AssemblyName>
     <PackageId>Volo.Blogging.EntityFrameworkCore</PackageId>
     <RootNamespace />
diff --git a/modules/docs/app/VoloDocs.EntityFrameworkCore/VoloDocs.EntityFrameworkCore.csproj b/modules/docs/app/VoloDocs.EntityFrameworkCore/VoloDocs.EntityFrameworkCore.csproj
index d7f8b49bae5..b70794e39b2 100644
--- a/modules/docs/app/VoloDocs.EntityFrameworkCore/VoloDocs.EntityFrameworkCore.csproj
+++ b/modules/docs/app/VoloDocs.EntityFrameworkCore/VoloDocs.EntityFrameworkCore.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <RootNamespace />
   </PropertyGroup>
 
diff --git a/modules/docs/src/Volo.Docs.EntityFrameworkCore/Volo.Docs.EntityFrameworkCore.csproj b/modules/docs/src/Volo.Docs.EntityFrameworkCore/Volo.Docs.EntityFrameworkCore.csproj
index 1111fa62a22..1eb5495e935 100644
--- a/modules/docs/src/Volo.Docs.EntityFrameworkCore/Volo.Docs.EntityFrameworkCore.csproj
+++ b/modules/docs/src/Volo.Docs.EntityFrameworkCore/Volo.Docs.EntityFrameworkCore.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>Volo.Docs.EntityFrameworkCore</AssemblyName>
     <PackageId>Volo.Docs.EntityFrameworkCore</PackageId>
     <RootNamespace />
diff --git a/modules/feature-management/src/Volo.Abp.FeatureManagement.EntityFrameworkCore/Volo.Abp.FeatureManagement.EntityFrameworkCore.csproj b/modules/feature-management/src/Volo.Abp.FeatureManagement.EntityFrameworkCore/Volo.Abp.FeatureManagement.EntityFrameworkCore.csproj
index 297d7fcaa47..54b94c7eef2 100644
--- a/modules/feature-management/src/Volo.Abp.FeatureManagement.EntityFrameworkCore/Volo.Abp.FeatureManagement.EntityFrameworkCore.csproj
+++ b/modules/feature-management/src/Volo.Abp.FeatureManagement.EntityFrameworkCore/Volo.Abp.FeatureManagement.EntityFrameworkCore.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <RootNamespace />
   </PropertyGroup>
 
diff --git a/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo.Abp.Identity.EntityFrameworkCore.csproj b/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo.Abp.Identity.EntityFrameworkCore.csproj
index 945905d75f3..87c5e27bd5e 100644
--- a/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo.Abp.Identity.EntityFrameworkCore.csproj
+++ b/modules/identity/src/Volo.Abp.Identity.EntityFrameworkCore/Volo.Abp.Identity.EntityFrameworkCore.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>Volo.Abp.Identity.EntityFrameworkCore</AssemblyName>
     <PackageId>Volo.Abp.Identity.EntityFrameworkCore</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
diff --git a/modules/permission-management/src/Volo.Abp.PermissionManagement.EntityFrameworkCore/Volo.Abp.PermissionManagement.EntityFrameworkCore.csproj b/modules/permission-management/src/Volo.Abp.PermissionManagement.EntityFrameworkCore/Volo.Abp.PermissionManagement.EntityFrameworkCore.csproj
index c13b3da80b9..037bda95898 100644
--- a/modules/permission-management/src/Volo.Abp.PermissionManagement.EntityFrameworkCore/Volo.Abp.PermissionManagement.EntityFrameworkCore.csproj
+++ b/modules/permission-management/src/Volo.Abp.PermissionManagement.EntityFrameworkCore/Volo.Abp.PermissionManagement.EntityFrameworkCore.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>Volo.Abp.PermissionManagement.EntityFrameworkCore</AssemblyName>
     <PackageId>Volo.Abp.PermissionManagement.EntityFrameworkCore</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
diff --git a/modules/setting-management/src/Volo.Abp.SettingManagement.EntityFrameworkCore/Volo.Abp.SettingManagement.EntityFrameworkCore.csproj b/modules/setting-management/src/Volo.Abp.SettingManagement.EntityFrameworkCore/Volo.Abp.SettingManagement.EntityFrameworkCore.csproj
index f5e1761cc54..c76680e8877 100644
--- a/modules/setting-management/src/Volo.Abp.SettingManagement.EntityFrameworkCore/Volo.Abp.SettingManagement.EntityFrameworkCore.csproj
+++ b/modules/setting-management/src/Volo.Abp.SettingManagement.EntityFrameworkCore/Volo.Abp.SettingManagement.EntityFrameworkCore.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>Volo.Abp.SettingManagement.EntityFrameworkCore</AssemblyName>
     <PackageId>Volo.Abp.SettingManagement.EntityFrameworkCore</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
diff --git a/modules/tenant-management/src/Volo.Abp.TenantManagement.EntityFrameworkCore/Volo.Abp.TenantManagement.EntityFrameworkCore.csproj b/modules/tenant-management/src/Volo.Abp.TenantManagement.EntityFrameworkCore/Volo.Abp.TenantManagement.EntityFrameworkCore.csproj
index 259f5e7a733..b103325b1a7 100644
--- a/modules/tenant-management/src/Volo.Abp.TenantManagement.EntityFrameworkCore/Volo.Abp.TenantManagement.EntityFrameworkCore.csproj
+++ b/modules/tenant-management/src/Volo.Abp.TenantManagement.EntityFrameworkCore/Volo.Abp.TenantManagement.EntityFrameworkCore.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>Volo.Abp.TenantManagement.EntityFrameworkCore</AssemblyName>
     <PackageId>Volo.Abp.TenantManagement.EntityFrameworkCore</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
diff --git a/modules/users/src/Volo.Abp.Users.EntityFrameworkCore/Volo.Abp.Users.EntityFrameworkCore.csproj b/modules/users/src/Volo.Abp.Users.EntityFrameworkCore/Volo.Abp.Users.EntityFrameworkCore.csproj
index d70b92e1a45..b6916f3aaac 100644
--- a/modules/users/src/Volo.Abp.Users.EntityFrameworkCore/Volo.Abp.Users.EntityFrameworkCore.csproj
+++ b/modules/users/src/Volo.Abp.Users.EntityFrameworkCore/Volo.Abp.Users.EntityFrameworkCore.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>Volo.Abp.Users.EntityFrameworkCore</AssemblyName>
     <PackageId>Volo.Abp.Users.EntityFrameworkCore</PackageId>
     <AssetTargetFallback>$(AssetTargetFallback);portable-net45+win8+wp8+wpa81;</AssetTargetFallback>
diff --git a/samples/BookStore-Modular/modules/book-management/src/Acme.BookStore.BookManagement.EntityFrameworkCore/Acme.BookStore.BookManagement.EntityFrameworkCore.csproj b/samples/BookStore-Modular/modules/book-management/src/Acme.BookStore.BookManagement.EntityFrameworkCore/Acme.BookStore.BookManagement.EntityFrameworkCore.csproj
index 5d0a8647feb..acf58d6c554 100644
--- a/samples/BookStore-Modular/modules/book-management/src/Acme.BookStore.BookManagement.EntityFrameworkCore/Acme.BookStore.BookManagement.EntityFrameworkCore.csproj
+++ b/samples/BookStore-Modular/modules/book-management/src/Acme.BookStore.BookManagement.EntityFrameworkCore/Acme.BookStore.BookManagement.EntityFrameworkCore.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <RootNamespace>Acme.BookStore.BookManagement</RootNamespace>
   </PropertyGroup>
 
diff --git a/templates/module/aspnet-core/src/MyCompanyName.MyProjectName.EntityFrameworkCore/MyCompanyName.MyProjectName.EntityFrameworkCore.csproj b/templates/module/aspnet-core/src/MyCompanyName.MyProjectName.EntityFrameworkCore/MyCompanyName.MyProjectName.EntityFrameworkCore.csproj
index 60607617681..38ec5462552 100644
--- a/templates/module/aspnet-core/src/MyCompanyName.MyProjectName.EntityFrameworkCore/MyCompanyName.MyProjectName.EntityFrameworkCore.csproj
+++ b/templates/module/aspnet-core/src/MyCompanyName.MyProjectName.EntityFrameworkCore/MyCompanyName.MyProjectName.EntityFrameworkCore.csproj
@@ -3,7 +3,7 @@
   <Import Project="..\..\common.props" />
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <RootNamespace>MyCompanyName.MyProjectName</RootNamespace>
   </PropertyGroup>