How to Build Multiple Binaries from Dotnet New Console?

$ dotnet new console
$ dotnet run
Hello, world!

using System;

class Echo {
    public static void Main(string[] args) {
        foreach (string arg in args) {
            Console.Write(arg);
            // Put space if not last argument
            if (arg != args[args.Length - 1]) {
                Console.Write(" ");
            }
            Console.WriteLine();
        }
    }
};

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

</Project>

class True {
  public static void Main() {
    System.exit(0);
  }
};

using System;

class NoteBox {
    public static void Main(string[] args) {
        switch (args[0]) {
        case "echo":
            // Call echo
            break;
        case "true":
            // Call true
            break;
        }
    }
};

    char *cmd = strrchr(argv[0], '/');
    cmd = cmd ? cmd + 1 : argv[0];