diff --git a/CodeQuality.props b/CodeQuality.props
index cf57b8b..314e91e 100644
--- a/CodeQuality.props
+++ b/CodeQuality.props
@@ -9,7 +9,7 @@
         <WarningsAsErrors>true</WarningsAsErrors>
     </PropertyGroup>
     <ItemGroup>
-        <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.435">
+        <PackageReference Include="StyleCop.Analyzers" Version="1.2.0-beta.507">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
diff --git a/src/NSExt.Tests/NSExt.Tests.csproj b/src/NSExt.Tests/NSExt.Tests.csproj
index 0fc2eab..18c41ba 100644
--- a/src/NSExt.Tests/NSExt.Tests.csproj
+++ b/src/NSExt.Tests/NSExt.Tests.csproj
@@ -1,9 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
-        <PackageReference Include="xunit" Version="2.4.2" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0"/>
+        <PackageReference Include="xunit" Version="2.5.1-pre.20"/>
     </ItemGroup>
     <ItemGroup>
-        <ProjectReference Include="..\NSExt\NSExt.csproj" />
+        <ProjectReference Include="..\NSExt\NSExt.csproj"/>
     </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/NSExt/Extensions/StringExtensions.cs b/src/NSExt/Extensions/StringExtensions.cs
index ea9c1a1..c826bba 100644
--- a/src/NSExt/Extensions/StringExtensions.cs
+++ b/src/NSExt/Extensions/StringExtensions.cs
@@ -495,6 +495,14 @@ public static class StringExtensions
         return $"<pre>{me}</pre>";
     }
 
+    /// <summary>
+    ///     ToString 的 Invariant 版本
+    /// </summary>
+    public static string ToInvString(this string me)
+    {
+        return me.ToString(CultureInfo.InvariantCulture);
+    }
+
     /// <summary>
     ///     首字母小写
     /// </summary>
diff --git a/src/NSExt/NSExt.csproj b/src/NSExt/NSExt.csproj
index b13a53b..5b63f16 100644
--- a/src/NSExt/NSExt.csproj
+++ b/src/NSExt/NSExt.csproj
@@ -1,5 +1,5 @@
 <Project Sdk="Microsoft.NET.Sdk">
-    <Import Project="../../CodeQuality.props" />
+    <Import Project="../../CodeQuality.props"/>
     <PropertyGroup>
         <AssemblyOriginatorKeyFile>../../key.snk</AssemblyOriginatorKeyFile>
         <DelaySign>false</DelaySign>
@@ -23,13 +23,13 @@
         <Title>$(AssemblyName)</Title>
     </PropertyGroup>
     <ItemGroup>
-        <PackageReference Include="Microsoft.Extensions.Logging" Version="7.0.0" />
-        <PackageReference Include="MinVer" Version="4.3.0">
+        <PackageReference Include="Microsoft.Extensions.Logging" Version="7.0.0"/>
+        <PackageReference Include="MinVer" Version="5.0.0-alpha.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
     </ItemGroup>
     <ItemGroup>
-        <None Include="../../logo.png" Pack="true" PackagePath="" />
+        <None Include="../../logo.png" Pack="true" PackagePath=""/>
     </ItemGroup>
 </Project>
\ No newline at end of file