diff --git a/tests/04a-realtime-oneshot-cs/Probe.csproj b/tests/04a-realtime-oneshot-cs/Probe.csproj
new file mode 100644
index 0000000..090526c
--- /dev/null
+++ b/tests/04a-realtime-oneshot-cs/Probe.csproj
@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <RootNamespace>RealtimeOneShotProbe</RootNamespace>
+    <AssemblyName>Probe</AssemblyName>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <RuntimeIdentifier>linux-arm64</RuntimeIdentifier>
+    <SelfContained>true</SelfContained>
+    <PublishSingleFile>false</PublishSingleFile>
+    <InvariantGlobalization>true</InvariantGlobalization>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="PortAudioSharp2" Version="1.0.6" />
+  </ItemGroup>
+</Project>