BindAndValidateOptions.cs

public static class ConfigurationBinderExtensions
{
    public static ValidateOptionsResult BindAndValidate<TOptions>(this IConfiguration configuration, TOptions instance) where TOptions : class, new()
    {
        configuration.Bind(instance);
        var validateOptions = new DataAnnotationValidateOptions<TOptions>(Options.DefaultName);
        return validateOptions.Validate(Options.DefaultName, instance);
    }
}