global using System.ComponentModel.DataAnnotations;
namespace SimpleAdmin.Core {
    [AttributeUsage(AttributeTargets.Property)]
    public sealed class DataValidationAttribute : Attribute { public DataValidationAttribute(ValidationTypes type) {} }
    public enum ValidationTypes { Numeric }
    public static class Oops { public static Exception Bah(string text) => new InvalidOperationException(text); }
}
namespace SimpleAdmin.Application {
    public static class Oops { public static Exception Bah(string text) => new InvalidOperationException(text); }
}