Azure Asp.net core CloudConfigurationManager.GetSetting（）为空

我有一个asp.NET4应用程序，它可以很好地工作，但我不能让它为asp.NETCore工作。文档中说，

GetSetting

在

web.config

或

app.config

文件中查找。 存储模拟器已打开

public void ConfigureServices(IServiceCollection services)
{
    AzureConfig.Initialize();
}

public static void Initialize()
{
    //Always null
    var connectionString = CloudConfigurationManager.GetSetting("StorageConnectionString");
}

根web.config文件：

<configuration>
    <appSettings>
        <add key="StorageConnectionString" value="UseDevelopmentStorage=true;" />
    </appSettings>
</configuration>

编辑，这也不起作用：

  {
  "ConnectionStrings": {
    "DefaultConnection": "..."
    "StorageConnectionString": "UseDevelopmentStorage=true"
  },
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Debug",
      "System": "Information",
      "Microsoft": "Information"
    }
  },
  "StorageConnectionString": "UseDevelopmentStorage=true"
}

---

在ASP.NET core中，设置已从web.config中移出，并移到appsettings.json中。查看文档，了解它是如何变化的：

另外，请看一下之前对类似问题的回答：

---

第二个链接正是我所需要的。谢谢

  {
  "ConnectionStrings": {
    "DefaultConnection": "..."
    "StorageConnectionString": "UseDevelopmentStorage=true"
  },
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Debug",
      "System": "Information",
      "Microsoft": "Information"
    }
  },
  "StorageConnectionString": "UseDevelopmentStorage=true"
}