A simple appsettings.json Configuration loader/viewer for your dotnet core console app

ConfigurationLoader.cs

// Create an appsettings.json in the root directory of your console application
// for example, it should look like:
// {
//  "Environment": {
//    "Token": "abc-123",
//    "Name": "Production"
//  }
//}
//
// In your Program.cs file, make sure to add:
// using System.Configuration;
//
// And you can use the configuration in your Main function like this:
//
// try
// {
//   var config = new ConfigurationLoader();
//   config.Load();
//   Console.WriteLine(config.GetProperty("Environment.Name"));
// }
// catch (Exception e)
// {
//   Console.WriteLine(e.Message);
// }
//
// This will output "Production", but otherwise it will output a dynamic object
// (typically a JsonElement since we're using the system.text.json library)

using System.Text.Json;
using System.IO;

namespace System.Configuration
{
    class ConfigurationLoader
    {

        private dynamic configJsonData;
        public ConfigurationLoader Load(string configFilePath = "appsettings.json")
        {
            var appSettings = File.ReadAllText(configFilePath);
            this.configJsonData = JsonSerializer.Deserialize(appSettings, typeof(object));
            return this;
        }

        public dynamic GetProperty(string key)
        {
            var properties = key.Split(".");
            dynamic property = this.configJsonData;
            foreach (var prop in properties)
            {
                property = property.GetProperty(prop);
            }

            return property;
        }
    }
}