From 980e8c4e049ed1426464307c0d336170b1ea41bf Mon Sep 17 00:00:00 2001
From: Brian Johnson <brian@brianjohnson.co.za>
Date: Sat, 15 Aug 2026 15:48:15 +0200
Subject: [PATCH] Added basic async/await timings to prove how it works.

---
 learning/dotnet/async-lab/Program.cs       | 32 ++++++++++++++++++++++
 learning/dotnet/async-lab/async-lab.csproj | 11 ++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 learning/dotnet/async-lab/Program.cs
 create mode 100644 learning/dotnet/async-lab/async-lab.csproj

diff --git a/learning/dotnet/async-lab/Program.cs b/learning/dotnet/async-lab/Program.cs
new file mode 100644
index 0000000..2026d46
--- /dev/null
+++ b/learning/dotnet/async-lab/Program.cs
@@ -0,0 +1,32 @@
+using System.Diagnostics;
+
+long startTime = Stopwatch.GetTimestamp();
+
+Console.WriteLine(
+    $"[Program] start - thread {Environment.CurrentManagedThreadId}, t = {Stopwatch.GetElapsedTime(startTime).TotalMilliseconds} ms"
+);
+
+var task = FetchUserAsync(42);
+Console.WriteLine(
+    $"[Program] after fetch - thread {Environment.CurrentManagedThreadId}, t = {Stopwatch.GetElapsedTime(startTime).TotalMilliseconds} ms"
+);
+
+var user = await task;
+Console.WriteLine(
+    $"[Program] after await - thread {Environment.CurrentManagedThreadId}, t = {Stopwatch.GetElapsedTime(startTime).TotalMilliseconds} ms"
+);
+
+return;
+
+async Task<string> FetchUserAsync(int id)
+{
+    Console.WriteLine(
+        $"[FetchUserAsync] entered - thread {Environment.CurrentManagedThreadId}, t = {Stopwatch.GetElapsedTime(startTime).TotalMilliseconds} ms"
+    );
+    await Task.Delay(500);
+    Console.WriteLine(
+        $"[FetchUserAsync] resumed, thread {Environment.CurrentManagedThreadId}, t = {Stopwatch.GetElapsedTime(startTime).TotalMilliseconds} ms"
+    );
+
+    return $"User ID: {id}";
+}
diff --git a/learning/dotnet/async-lab/async-lab.csproj b/learning/dotnet/async-lab/async-lab.csproj
new file mode 100644
index 0000000..42b22b1
--- /dev/null
+++ b/learning/dotnet/async-lab/async-lab.csproj
@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net10.0</TargetFramework>
+    <RootNamespace>async_lab</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>