如何在Nuget包项目中读取父项目等的appsettings.json？

public class ParentProjectConfig
{
    public string ConnectionString { get; set; }
    // 其他配置项...
}

public void ConfigureServices(IServiceCollection services)
{
    // 读取appsettings.json配置
    IConfiguration configuration = new ConfigurationBuilder()
        .SetBasePath(Directory.GetCurrentDirectory())
        .AddJsonFile("appsettings.json", optional: true)
        .Build();

    // 构建配置对象
    ParentProjectConfig parentProjectConfig = new ParentProjectConfig();
    configuration.GetSection("ParentProjectConfig").Bind(parentProjectConfig);

    // 注入配置对象到Nuget包项目
    services.AddSingleton(parentProjectConfig);
}

public class MyService
{
    private readonly ParentProjectConfig _parentProjectConfig;

    public MyService(ParentProjectConfig parentProjectConfig)
    {
        _parentProjectConfig = parentProjectConfig;
    }

    public void DoSomething()
    {
        // 使用父项目的配置信息
        string connectionString = _parentProjectConfig.ConnectionString;
        // 其他操作...
    }
}