This is a sample app, trying to demonstrate the smallest ASP.NET Core Minimal API, a "Hello World!" example. The *Program.cs** is only three lines of code.

**Program.cs**:

```csharp
var app = WebApplication.CreateBuilder(args).Build();
app.MapGet("/", () => "Hello World!");
app.Run();
```

<details>
<summary>Expand to see *Sample.cspoj* and *launchSettings.json* files</summary>

**Sample.csproj**:

```xml
<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>net7.0</TargetFramework>
    <Nullable>enable</Nullable>
    <ImplicitUsings>enable</ImplicitUsings>
  </PropertyGroup>
</Project>
```

**Properties/launchSettings.json**:

```json
{
  "$schema": "https://json.schemastore.org/launchsettings.json",
  "profiles": {
    "http": {
      "commandName": "Project",
      "dotnetRunMessages": true,
      "launchBrowser": true,
      "applicationUrl": "http://localhost:5029",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "https": {
      "commandName": "Project",
      "dotnetRunMessages": true,
      "launchBrowser": true,
      "applicationUrl": "https://localhost:7263;http://localhost:5029",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    }
  }
}
```

> **Note**
> The *appsettings.json* file is optional

![image](https://user-images.githubusercontent.com/7679720/216140158-3af1d774-84b3-45fe-b0e4-8732b58c7e3b.png)

</details>

Run the app:

![image](https://user-images.githubusercontent.com/7679720/216138994-f260d870-04eb-4b5d-ba89-5259519fce65.png)