将app.config添加到.net核心wpf应用程序的正确方法是什么，因为它与.net框架不同？

{
  "AppSettings": {
    "ConnectionString": "Server=myServerAddress;Database=myDataBase;User Id=myUsername;Password=myPassword;"
  }
}

using Microsoft.Extensions.Configuration;

// ...

public partial class App : Application
{
    public IConfiguration Configuration { get; private set; }

    protected override void OnStartup(StartupEventArgs e)
    {
        var builder = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("appsettings.json");

        Configuration = builder.Build();

        // 使用配置信息
        string connectionString = Configuration.GetSection("AppSettings:ConnectionString").Value;

        // ...

        base.OnStartup(e);
    }
}