using System.ComponentModel.DataAnnotations; namespace PolyclinicDatabaseImplement.Models { public class SymptomDiagnose { public int Id { get; set; } [Required] public int SymptomId { get; set; } [Required] public int DiagnoseId { get; set; } public virtual Symptom? Symptom { get; set; } public virtual Diagnose? Diagnose { get; set; } } }