添加项目文件。

Common/Common.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="ncalc" Version="1.3.8" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.5-beta1" />
+    <PackageReference Include="System.IO.Ports" Version="11.0.0-preview.4.26230.115" />
+  </ItemGroup>
+
+</Project>