在ASP.NET中的Development/UAT/Prod环境之间切换配置的最佳方法？

 <connectionStrings>
    <add name="MyDB" connectionString="Data Source=localhost;Initial Catalog=MyDB;Integrated Security=True" providerName="System.Data.SqlClient" />
  </connectionStrings>
  <appSettings>
    <add key="Environment" value="Development" />
  </appSettings>
</configuration>

string environment = ConfigurationManager.AppSettings["Environment"];

 <connectionStrings>
    <add name="MyDB" connectionString="Data Source=uat-db-server;Initial Catalog=MyDB;Integrated Security=True" providerName="System.Data.SqlClient" xdt:Transform="SetAttributes" xdt:Locator="Match(name)" />
  </connectionStrings>
  <appSettings>
    <add key="Environment" value="UAT" xdt:Transform="SetAttributes" xdt:Locator="Match(key)" />
  </appSettings>
</configuration>

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

    public IConfiguration Configuration { get; }

    public void ConfigureServices(IServiceCollection services)
    {
        string environment = Configuration["Environment"];
        // ...
    }
}