Add appsettings.json to a .Net Core Console Application

Firstly add the appsettings.json file to the solution

{
   "AppSettings": {
   "Key1": "This is the value for Key1"
  }
}

Set the .json file to copy to the output directory (this is the bin folder)

Add Microsoft.Extensions.Configuration.Json from Nuget

The read the file

IConfiguration config = new ConfigurationBuilder()
 .AddJsonFile("appsettings.json", true, true)
 .Build();

var key1 = config["AppSettings:Key1"];
Console.WriteLine(key1);

Run the code!