appsettings.json
{ "Url": { "WebAPIBaseUrl": "https://xxxx.xxx.xx.jp" } }
Program.cs
using Microsoft.Extensions.Configuration; namespace Console1 { internal class Program { static void Main(string[] args) { IConfiguration configuration = new ConfigurationBuilder() .SetBasePath(Directory.GetCurrentDirectory()) .AddJsonFile(path: "appsettings.json") .Build(); Console.WriteLine(configuration["Url:WebAPIBaseUrl"]); // > https://xxxx.xxx.xx.jp Console.ReadLine(); } } }