Fixes #42741

docs/core/docker/build-container.md

@@ -502,6 +502,9 @@ C:\>dir
 C:\>^C
 ```
 
+> [!NOTE]
+> This example only works on Windows containers. Linux containers don't have `cmd.exe`.
+
 #### [Linux](#tab/linux)
 
 In this example, `ENTRYPOINT` is changed to `bash`. The `exit` command is run which ends the process and stop the container.
@@ -519,6 +522,9 @@ root@9f8de8fbd4a8:/App# exit
 exit
 ```
 
+> [!NOTE]
+> This example only works on Linux containers. Windows containers don't have `bash`.
+
 ---
 
 ## Essential commands

docs/core/docker/snippets/9.0/Worker/Program.cs

@@ -0,0 +1,7 @@
+using Worker;
+
+var builder = Host.CreateApplicationBuilder(args);
+builder.Services.AddHostedService<Worker>();
+
+var host = builder.Build();
+host.Run();

docs/core/docker/snippets/9.0/Worker/Properties/launchSettings.json

@@ -0,0 +1,15 @@
+{
+  "profiles": {
+    "Worker": {
+      "commandName": "Project",
+      "environmentVariables": {
+        "DOTNET_ENVIRONMENT": "Development"
+      },
+      "dotnetRunMessages": true
+    },
+    "Container (.NET SDK)": {
+      "commandName": "SdkContainer"
+    }
+  },
+  "$schema": "https://json.schemastore.org/launchsettings.json"
+}

docs/core/docker/snippets/9.0/Worker/Worker.cs

@@ -0,0 +1,23 @@
+namespace Worker;
+
+public class Worker : BackgroundService
+{
+    private readonly ILogger<Worker> _logger;
+
+    public Worker(ILogger<Worker> logger)
+    {
+        _logger = logger;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            if (_logger.IsEnabled(LogLevel.Information))
+            {
+                _logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
+            }
+            await Task.Delay(1000, stoppingToken);
+        }
+    }
+}

docs/core/docker/snippets/9.0/Worker/Worker.csproj

@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk.Worker">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <UserSecretsId>dotnet-Worker-2ecd8110-3fcc-4ccb-a1d6-952f1adba2c5</UserSecretsId>
+    <RuntimeIdentifiers>linux-x64</RuntimeIdentifiers>
+    <EnableSdkContainerDebugging>True</EnableSdkContainerDebugging>
+    <ContainerBaseImage>mcr.microsoft.com/dotnet/runtime:9.0</ContainerBaseImage>
+    <IsPublishable>True</IsPublishable>
+    <EnableSdkContainerSupport>True</EnableSdkContainerSupport>
+    <DockerfileContext>.</DockerfileContext>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.0" />
+  </ItemGroup>
+</Project>

docs/core/docker/snippets/9.0/Worker/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  }
+}

docs/core/docker/snippets/9.0/Worker/appsettings.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  }
+}