Program.cs

using System;

public partial class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine();
        _ = ThisAssembly.Info.InformationalVersion;
    }
}

SourceGen.csproj

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

  <PropertyGroup>
    <TargetFramework>net6.0</TargetFramework>
    <DebugType>embedded</DebugType>
    <LangVersion>latest</LangVersion>
    <Prefer32Bit>true</Prefer32Bit>
    <OutputType>Exe</OutputType>
    <Version>1.0.0</Version>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="ThisAssembly.AssemblyInfo" Version="1.0.8" />
  </ItemGroup>

</Project>