using FluentValidation; namespace InternshipSystem.Api.Queries { public class StudentForm { public long Id { get; set; } public int? AlbumNumber { get; set; } public string FirstName { get; set; } public string LastName { get; set; } public string Email { get; set; } public string Course { get; set; } public int? Semester { get; set; } public class Validator : AbstractValidator { public Validator() { RuleFor(c => c.Id).NotNull(); } } } }