diff --git a/csharp/ToolGood.Words.PinYinSearch/ToolGood.Words.PinYinSearch.csproj b/csharp/ToolGood.Words.PinYinSearch/ToolGood.Words.PinYinSearch.csproj
index 5e300fc..cab1a86 100644
--- a/csharp/ToolGood.Words.PinYinSearch/ToolGood.Words.PinYinSearch.csproj
+++ b/csharp/ToolGood.Words.PinYinSearch/ToolGood.Words.PinYinSearch.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>net40;net45;netstandard2.0;netstandard2.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/csharp/ToolGood.Words.Test/ToolGood.Words.Test.csproj b/csharp/ToolGood.Words.Test/ToolGood.Words.Test.csproj
index e0d4a06..8cfe19f 100644
--- a/csharp/ToolGood.Words.Test/ToolGood.Words.Test.csproj
+++ b/csharp/ToolGood.Words.Test/ToolGood.Words.Test.csproj
@@ -273,6 +273,10 @@
     </Content>
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\ToolGood.Words.PinYinSearch\ToolGood.Words.PinYinSearch.csproj">
+      <Project>{b3d989c2-a05e-436f-9e0d-72fd9616039a}</Project>
+      <Name>ToolGood.Words.PinYinSearch</Name>
+    </ProjectReference>
     <ProjectReference Include="..\ToolGood.Words\ToolGood.Words.csproj">
       <Project>{4A5BA2B0-8C34-4891-89BC-F1536AE424D1}</Project>
       <Name>ToolGood.Words</Name>
diff --git a/csharp/ToolGood.Words/ToolGood.Words.csproj b/csharp/ToolGood.Words/ToolGood.Words.csproj
index 86123f8..e08b8b5 100644
--- a/csharp/ToolGood.Words/ToolGood.Words.csproj
+++ b/csharp/ToolGood.Words/ToolGood.Words.csproj
@@ -36,7 +36,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <None Include="..\LICENSE">
+    <None Include="..\..\LICENSE">
       <Pack>True</Pack>
       <PackagePath></PackagePath>
     </None>