Native AOT static linking demo

demo.csproj

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

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net7.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
    <PublishAot>true</PublishAot>
  </PropertyGroup>

  <ItemGroup>
    <NativeLibrary Include="mylibrary.obj" />
    <DirectPInvoke Include="mylibrary" />
  </ItemGroup>

</Project>

mylibrary.c

extern int MyMethod();

int MyMethod()
{
    return 42;
}

Program.cs

using System.Runtime.InteropServices;

partial class Program
{
    static void Main() => Console.WriteLine(MyMethod());

    [LibraryImport("MyLibrary")]
    private static partial int MyMethod();
}