/// <summary>
/// 创建 ServiceProvider 对象
/// </summary>
/// <param name="configure">服务注册配置</param>
/// <param name="fallback">回退服务提供程序，若获取不到指定类型的服务，则回退到这个服务提供程序获取</param>
public static ServiceProvider Create(Action <ServiceRegistration> configure, IServiceProvider fallback = null)
{
if (fallback is ServiceProvider instance)
{
return(instance.Merge(Create(configure)));
}
var registration = new ServiceRegistration();
configure(registration);
return(new ServiceProvider(registration.Build(), fallback));
}