using System.ComponentModel.DataAnnotations; using Microsoft.EntityFrameworkCore; namespace PF3.Models; [PrimaryKey(nameof(ShowId), nameof(MaterialId))] public class ShowMaterial { [Required] public Show? Show { get; set; } [Required] public int ShowId { get; set; } public Material? Material { get; set; } [Required] public int MaterialId { get; set; } }