NetCore 控制台项目获取 appsettings.json

var builder = new ConfigurationBuilder().SetBasePath(Directory.GetCurrentDirectory()).AddJsonFile("appsettings.json");
var configuration = builder.Build();
string baseUrl = configuration.GetSection("baseUrl").Value;

appsettings.json

{
  "baseUrl": "http://duyaonet.com"
}

.net core 出错 appsettings.json' was not found and is not optional. 找不到文件

解决办法 

appsettings.json的属性   复制到输出目录: 始终复制