add examples domain_01

Examples/domain_01/Entitys/Album.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace domain_01.Entitys
+{
+	/// <summary>
+	/// 专辑
+	/// </summary>
+	public class Album
+    {
+		public Guid Id { get; set; }
+
+		public string Name { get; set; }
+
+		public virtual ICollection<Song> Songs { get; set; }
+
+		public DateTime PublishTime { get; set; }
+	}
+}