diff --git a/tests/01-record-play-cs/Probe.csproj b/tests/01-record-play-cs/Probe.csproj
new file mode 100644
index 0000000..b92ac93
--- /dev/null
+++ b/tests/01-record-play-cs/Probe.csproj
@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <RootNamespace>RecordPlayProbe</RootNamespace>
+    <AssemblyName>Probe</AssemblyName>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <RuntimeIdentifier>linux-arm64</RuntimeIdentifier>
+    <SelfContained>true</SelfContained>
+    <PublishSingleFile>false</PublishSingleFile>
+    <InvariantGlobalization>true</InvariantGlobalization>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="PortAudioSharp2" Version="1.0.6" />
+  </ItemGroup>
+</Project>
diff --git a/tests/01-record-play-cs/Program.cs b/tests/01-record-play-cs/Program.cs
new file mode 100644
index 0000000..b810bd1
--- /dev/null
+++ b/tests/01-record-play-cs/Program.cs
@@ -0,0 +1,22 @@
+using PortAudioSharp;
+
+Environment.SetEnvironmentVariable("PA_ALSA_PLUGHW", "1");
+
+PortAudio.Initialize();
+try
+{
+    int count = PortAudio.DeviceCount;
+    Console.WriteLine($"PortAudio version: {PortAudio.VersionInfo.versionText}");
+    Console.WriteLine($"Devices ({count}):");
+    for (int i = 0; i < count; i++)
+    {
+        var info = PortAudio.GetDeviceInfo(i);
+        Console.WriteLine(
+            $"  [{i}] {info.name}  in={info.maxInputChannels} out={info.maxOutputChannels} " +
+            $"defaultSr={info.defaultSampleRate}");
+    }
+}
+finally
+{
+    PortAudio.Terminate();
+}