Get appsettings.json to class inside Startup.cs.

Hi everyone,

I'm creating some web apis which CRUD information of foods.

My data base is now a json file. And I have config like this in my appsettings.json :

{"Logging": {"IncludeScopes": false,"LogLevel": {"Default": "Verbose","System": "Information","Microsoft": "Information"
    }
  },"ApplicationSettings": {"VirtualFoodDataFile": "~/Resources/FoodsList.json"
  }
}

And I also have a class :

namespace ApiLayer.Models
{
    public class ApplicationSettings
    {
        /// <summary>
        /// Virtual path of file contains foods data.
        /// </summary>
        public string VirtualFoodDataFile { get; set; }
    }
}

I wonder how I can transfer information from my appsettings.json to ApplicationSettings object in Startup.cs. 
Because I want to load my foods data when my application starts. 

Please show me how to do please ?

Thank you,

P/s : I just want to transfer information from json file to ApplicationSettings object, so, please show me how to do in Startup.cs.