file-folder-helper/Models/AppSettings.cs

using Microsoft.Extensions.Configuration;
using System.Text.Json;
using System.Text.Json.Serialization;

namespace File_Folder_Helper.Models;

public record AppSettings(string Company,
                          string DefaultNoteType,
                          string[] ExcludeDirectoryNames,
                          string[] ExcludeSchemes,
                          string PersonBirthdayFormat,
                          string PersonTitleFilters,
                          string[] ValidImageFormatExtensions,
                          string WorkingDirectoryName)
{

    public override string ToString()
    {
        string result = JsonSerializer.Serialize(this, AppSettingsSourceGenerationContext.Default.AppSettings);
        return result;
    }

    private static void PreVerify(IConfigurationRoot configurationRoot, AppSettings? appSettings)
    {
        if (appSettings?.Company is null)
        {
            List<string> paths = [];
            foreach (IConfigurationProvider configurationProvider in configurationRoot.Providers)
            {
                if (configurationProvider is not Microsoft.Extensions.Configuration.Json.JsonConfigurationProvider jsonConfigurationProvider)
                    continue;
                if (jsonConfigurationProvider.Source.FileProvider is not Microsoft.Extensions.FileProviders.PhysicalFileProvider physicalFileProvider)
                    continue;
                paths.Add(physicalFileProvider.Root);
            }
            throw new NotSupportedException($"Not found!{Environment.NewLine}{string.Join(Environment.NewLine, paths.Distinct())}");
        }
    }

    public static AppSettings Get(IConfigurationRoot configurationRoot)
    {
        AppSettings? result;
#pragma warning disable IL3050, IL2026
        result = configurationRoot.Get<AppSettings>();
#pragma warning restore IL3050, IL2026
        PreVerify(configurationRoot, result);
        if (result is null)
            throw new Exception("Not set!");
        return result;
    }

}

[JsonSourceGenerationOptions(WriteIndented = true)]
[JsonSerializable(typeof(AppSettings))]
internal partial class AppSettingsSourceGenerationContext : JsonSerializerContext
{
}