diff --git a/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj b/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj
index de147646..404f56c4 100644
--- a/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj
+++ b/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj
@@ -9,7 +9,6 @@
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="Microsoft.CSharp" />
-    <Reference Include="System.Management" />
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="AvalonEdit" Version="6.0.1" />
diff --git a/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj b/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj
index 30396196..7a7c711c 100644
--- a/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj
+++ b/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj
@@ -14,7 +14,6 @@
     <PackageReference Include="AvalonEdit" Version="6.0.1" />
     <PackageReference Include="MvvmLightLibsStd10" Version="5.4.1.1" />
     <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
-    <PackageReference Include="System.Management" Version="4.6.0" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="..\..\Shared\HandyControlDemo_Shared\Data\MessageToken.cs">
diff --git a/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems b/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems
index 9e2f6ce1..59a21ff5 100644
--- a/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems
+++ b/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems
@@ -38,7 +38,6 @@
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Converter\StringRepeatConverter.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Extension\LangExtension.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Helper\AssemblyHelper.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)Tools\Helper\CommonHelper.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Helper\Win32Helper.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)UserControl\Basic\Avatar.xaml.cs">
       <DependentUpon>Avatar.xaml</DependentUpon>
diff --git a/src/Shared/HandyControlDemo_Shared/Tools/Helper/CommonHelper.cs b/src/Shared/HandyControlDemo_Shared/Tools/Helper/CommonHelper.cs
deleted file mode 100644
index 75ef4e9c..00000000
--- a/src/Shared/HandyControlDemo_Shared/Tools/Helper/CommonHelper.cs
+++ /dev/null
@@ -1,25 +0,0 @@
-using System.Linq;
-using System.Management;
-using HandyControl.Data;
-
-namespace HandyControlDemo.Tools
-{
-    public class CommonHelper
-    {
-        public static SystemVersionInfo GetSystemVersionInfo()
-        {
-            var managementClass = new ManagementClass("Win32_OperatingSystem");
-            var instances = managementClass.GetInstances();
-            foreach (var instance in instances)
-            {
-                if (instance["Version"] is string version)
-                {
-                    var nums = version.Split('.').Select(int.Parse).ToList();
-                    var info = new SystemVersionInfo(nums[0], nums[1], nums[2]);
-                    return info;
-                }
-            }
-            return default;
-        }
-    }
-}
\ No newline at end of file