Adding YAML Settings into ASP.NET Core Apps

startup-constructor-basic.cs

public class Startup
{
  public Startup(IHostingEnvironment env)
  {
    var builder = new ConfigurationBuilder()
                      .SetBasePath(env.ContentRootPath);

    // Adds JSON settings
    builder.AddJsonFile("appsettings.json", optional: true, adOnChange: true);
    builder.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true);

    // Adds Secret settings (in JSON format)
    if (env.IsDevelopment)
    {
      builder.AddUserSecrets();
    }

    // Adds environment variables
    builder.AddEnvironmentVariables();

    this.Configuration = builder.Build();
  }

  ...
}