如何在.net核心应用编程接口项目中读取appsetting.json文件中的多个连接字符串

{
  "ConnectionStrings": {
    "DefaultConnection": "YourConnectionString1",
    "SecondaryConnection": "YourConnectionString2"
  },
  // 其他配置...
}

using Microsoft.Extensions.Configuration;
using System;

namespace YourNamespace
{
    public class ConnectionStrings
    {
        public string DefaultConnection { get; set; }
        public string SecondaryConnection { get; set; }
    }

    public class Startup
    {
        public IConfiguration Configuration { get; }

        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public void ConfigureServices(IServiceCollection services)
        {
            // 读取appsettings.json中的连接字符串
            var connectionStringSettings = new ConnectionStrings
            {
                DefaultConnection = Configuration.GetConnectionString("DefaultConnection"),
                SecondaryConnection = Configuration.GetConnectionString("SecondaryConnection")
            };

            // 将连接字符串配置添加到服务容器中
            services.AddSingleton(connectionStringSettings);

            // 其他服务配置...
        }
    }
}