chore: import upstream snapshot with attribution

sdks/code-interpreter/csharp/src/OpenSandbox.CodeInterpreter/OpenSandbox.CodeInterpreter.csproj

@@ -0,0 +1,74 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFrameworks>netstandard2.0;netstandard2.1;net6.0;net7.0;net8.0;net9.0;net10.0</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <RootNamespace>OpenSandbox.CodeInterpreter</RootNamespace>
+    <AssemblyName>OpenSandbox.CodeInterpreter</AssemblyName>
+
+    <!-- Package Information -->
+    <PackageId>Alibaba.OpenSandbox.CodeInterpreter</PackageId>
+    <Version>$(OpenSandboxCodeInterpreterPackageVersion)</Version>
+    <Authors>Alibaba Group</Authors>
+    <Company>Alibaba Group Holding Ltd.</Company>
+    <Product>OpenSandbox Code Interpreter SDK</Product>
+    <Description>A C# SDK for code interpretation with OpenSandbox. Provides high-level APIs for executing code in multiple languages (Python, JavaScript, TypeScript, Go, Java, Bash) within secure sandbox environments.</Description>
+    <Copyright>Copyright 2026 Alibaba Group Holding Ltd.</Copyright>
+    <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
+    <PackageProjectUrl>https://open-sandbox.ai</PackageProjectUrl>
+    <RepositoryUrl>https://github.com/opensandbox-group/OpenSandbox.git</RepositoryUrl>
+    <RepositoryType>git</RepositoryType>
+    <PackageTags>sandbox;code-interpreter;execution;opensandbox;alibaba;python;javascript</PackageTags>
+    <PackageReadmeFile>README.md</PackageReadmeFile>
+
+    <!-- Build Settings -->
+    <GenerateDocumentationFile>true</GenerateDocumentationFile>
+    <NoWarn>$(NoWarn);CS1591</NoWarn>
+    <TreatWarningsAsErrors Condition="'$(Configuration)' == 'Release'">true</TreatWarningsAsErrors>
+
+    <!--
+      Default to local source reference for development.
+      For release packing with NuGet version range, run:
+      dotnet pack -c Release -p:UseLocalOpenSandboxProjectReference=false
+    -->
+    <UseLocalOpenSandboxProjectReference Condition="'$(UseLocalOpenSandboxProjectReference)' == ''">true</UseLocalOpenSandboxProjectReference>
+  </PropertyGroup>
+
+  <!-- Expose internals to test project -->
+  <ItemGroup>
+    <InternalsVisibleTo Include="OpenSandbox.CodeInterpreter.Tests" />
+  </ItemGroup>
+
+  <!-- Use local project reference for day-to-day development -->
+  <ItemGroup Condition="'$(UseLocalOpenSandboxProjectReference)' == 'true'">
+    <ProjectReference Include="..\..\..\..\sandbox\csharp\src\OpenSandbox\OpenSandbox.csproj" />
+  </ItemGroup>
+
+  <!-- Use NuGet dependency range for release packaging -->
+  <ItemGroup Condition="'$(UseLocalOpenSandboxProjectReference)' != 'true'">
+    <PackageReference Include="Alibaba.OpenSandbox" Version="$(OpenSandboxDependencyVersionRange)" />
+  </ItemGroup>
+
+  <!-- Common Dependencies -->
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.2" />
+    <PackageReference Include="System.Text.Json" Version="8.0.5" />
+    <PackageReference Include="PolySharp" Version="1.14.1">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <!-- .NET Standard 2.0 specific dependencies -->
+  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
+    <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="8.0.0" />
+  </ItemGroup>
+
+  <!-- Package files -->
+  <ItemGroup>
+    <None Include="..\..\README.md" Pack="true" PackagePath="\" />
+  </ItemGroup>
+
+</Project>