Strong-Typer

using System.ComponentModel.DataAnnotations;
using Microsoft.Extensions.Options;

public class DatabaseOptions
{
    public const string SectionName = "Database";

    [Required]
    public string ConnectionString { get; init; } = default!;
    [Required]
    public int Timeout { get; init; } = default!;
    [Required]
    public int MaxPoolSize { get; init; } = default!;
    [Required]
    public RetryPolicyOptions RetryPolicy { get; init; } = default!;
}

public class RetryPolicyOptions
{
    public const string SectionName = "Database:RetryPolicy";

    [Required]
    public int Count { get; init; } = default!;
    [Required]
    public int Interval { get; init; } = default!;
}

public class AuthenticationOptions
{
    public const string SectionName = "Authentication";

    [Required]
    public JwtOptions Jwt { get; init; } = default!;
    [Required]
    public List<string> AllowedOrigins { get; init; } = default!;
}

public class JwtOptions
{
    public const string SectionName = "Authentication:Jwt";

    [Required]
    public string Issuer { get; init; } = default!;
    [Required]
    public string Audience { get; init; } = default!;
    [Required]
    public string SecretKey { get; init; } = default!;
    [Required]
    public int ExpiryMinutes { get; init; } = default!;
}

public class LoggingOptions
{
    public const string SectionName = "Logging";

    [Required]
    public string LogLevel { get; init; } = default!;
    [Required]
    public bool EnableConsole { get; init; } = default!;
    [Required]
    public bool EnableFile { get; init; } = default!;
}

// Registration code:
builder.Services.AddOptions<DatabaseOptions>()
    .Bind(builder.Configuration.GetSection(DatabaseOptions.SectionName))
    .ValidateDataAnnotations()
    .ValidateOnStart();
builder.Services.AddOptions<RetryPolicyOptions>()
    .Bind(builder.Configuration.GetSection(RetryPolicyOptions.SectionName))
    .ValidateDataAnnotations()
    .ValidateOnStart();
builder.Services.AddOptions<AuthenticationOptions>()
    .Bind(builder.Configuration.GetSection(AuthenticationOptions.SectionName))
    .ValidateDataAnnotations()
    .ValidateOnStart();
builder.Services.AddOptions<JwtOptions>()
    .Bind(builder.Configuration.GetSection(JwtOptions.SectionName))
    .ValidateDataAnnotations()
    .ValidateOnStart();
builder.Services.AddOptions<LoggingOptions>()
    .Bind(builder.Configuration.GetSection(LoggingOptions.SectionName))
    .ValidateDataAnnotations()
    .ValidateOnStart();

// Usage Example in a Service/Controller:
public class MyService
{
    private readonly DatabaseOptions _options;

    public MyService(IOptions<DatabaseOptions> options)
    {
        _options = options.Value;
    }

    public void DoSomething()
    {
        // Access properties via _options.ConnectionString
    }
}