How to check if a section in MVC Core configuration file exist?

Question

How can I check if a specific section in loaded ASP.NET Core configuration file exist?

I have a JSON configuration file that I load it in Startup class via ConfigurationBuilder.AddJsonFile method.

This JSON file is an array with this layout:

{
   "Url": "",
   "Regex": [ "", "" ],
   "Keys": {
     "Title": "",
     "Description": "",
     "Keywords": [ "" ]
   }
}

But some of them doesn't have Keys. I tried to check return type of section.GetSection("Keys") against null, But it doesn't return null even if Keys section isn't present.

Answer 1

Also it is possible to use use Exists extension method from Microsoft.Extensions.Configuration.Abstractions. Exapmle:

var section = Configuration.GetSection("Keys")
var sectionExists = section.Exists();

or

public bool IsExistsConfigurationSection(string sectionKey)
{
    return Configuration.GetSection(sectionKey).Exists();
}