Projektdateien hinzufügen.

Webshop.Domain/Entities/Supplier.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Webshop.Domain.Entities;
+
+/// <summary>
+/// Details zu den Produktlieferanten.
+/// </summary>
+public class Supplier
+{
+    [Key]
+    public Guid Id { get; set; }
+
+    [Required]
+    [MaxLength(255)]
+    public string Name { get; set; }
+
+    [MaxLength(255)]
+    public string? ContactPerson { get; set; }
+
+    [MaxLength(256)]
+    [EmailAddress]
+    public string? Email { get; set; }
+
+    [MaxLength(50)]
+    [Phone]
+    public string? PhoneNumber { get; set; }
+
+    [ForeignKey(nameof(Address))]
+    public Guid? AddressId { get; set; }
+
+    [MaxLength(1000)]
+    public string? Notes { get; set; }
+
+    // Navigation Properties
+    public virtual Address? Address { get; set; }
+    public virtual ICollection<Product> Products { get; set; } = new List<Product>();
+}