diff --git a/.github/workflows/hello.yml b/.github/workflows/hello.yml
deleted file mode 100644
index a1ff283..0000000
--- a/.github/workflows/hello.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-name: Hello
-
-on: [push]
-
-jobs:
-  say-hello:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Say hello
-        run: echo "hello"
diff --git a/.github/workflows/secret.yml b/.github/workflows/icfp.yml
similarity index 92%
rename from .github/workflows/secret.yml
rename to .github/workflows/icfp.yml
index b654a04..b6f2e03 100644
--- a/.github/workflows/secret.yml
+++ b/.github/workflows/icfp.yml
@@ -1,4 +1,4 @@
-name: Use Secret Token
+name: icfp
 on: [push]
 jobs:
   build:
diff --git a/csharp-app/Program.cs b/csharp-app/Program.cs
new file mode 100644
index 0000000..da62739
--- /dev/null
+++ b/csharp-app/Program.cs
@@ -0,0 +1,15 @@
+using System;
+
+class Program
+{
+    static void Main(string[] args)
+    {
+        if (args.Length < 1)
+        {
+            Console.WriteLine("Please provide an argument.");
+            return;
+        }
+
+        Console.WriteLine($"Argument: {args[0]}");
+    }
+}
diff --git a/csharp-app/csharp-app.csproj b/csharp-app/csharp-app.csproj
new file mode 100644
index 0000000..64e34a8
--- /dev/null
+++ b/csharp-app/csharp-app.csproj
@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+</Project>