错误CS1503-无法从转换Microsoft.Extensions.Configuration.IConfigurationSection到系统动作<>

我收到一个错误:

当我使用Configure with Bind()时,它正在工作。

var bandConfig = new BandSettings();
Configuration.GetSection("BandSettings").Bind(bandConfig );

但是通过下面的代码,我得到了上面的错误。

我在博客和其他论坛上尝试了很多解决方案, 例如- Getting value from appsettings.json in .net core

但还是同样的错误。我遗漏了什么吗??

我有以下几点: 应用设置.json

"BandSettings":{ 
"UserID": "aTestUserID", 
"Password" : "aTestPassword" 
}

波段设置.cs

public class BandWidthSettings
{
    public string UserID { get; set; }
    public string ApiToken { get; set; }
}

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

public static IConfiguration GetTestConfiguration()
         => new ConfigurationBuilder()
                       .AddJsonFile("appsettings.json")
                       .Build();

public IConfiguration Configuration { get; }

public TestHelper(IConfiguration configuration)
{
    Configuration = configuration;
}
public void ConfigureServices(IServiceCollection services)
{

    var config = new BandSettings();
    var bandSettingsSection = Configuration.GetSection("BandSettings");
    services.Configure<BandSettings>(bandSettingsSection);  //Error is getting on this line - bandSettingsSection
}