godot/modules/mono/editor/GodotTools/GodotTools.Core/GodotTools.Core.csproj

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <ProjectGuid>{639E48BD-44E5-4091-8EDD-22D36DC0768D}</ProjectGuid>
    <TargetFramework>net6.0</TargetFramework>
    <LangVersion>10</LangVersion>
    <Nullable>enable</Nullable>
  </PropertyGroup>
</Project>