add examples domain_01

Examples/domain_01/Entitys/Song.cs

@@ -0,0 +1,25 @@
+using FreeSql.DataAnnotations;
+using System;
+using System.Collections.Generic;
+
+namespace domain_01.Entitys {
+
+	/// <summary>
+	/// 歌曲
+	/// </summary>
+	public class Song {
+
+		public Guid Id { get; set; }
+
+		public Guid SingerId { get; set; }
+		public virtual Guid Singer { get; set; }
+
+		public string Name { get; set; }
+
+		public string Url { get; set; }
+
+		public virtual ICollection<Album> Albums { get; set; }
+
+		public DateTime RegTime { get; set; } = DateTime.Now;
+	}
+}