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; }
+	}
+}

Examples/domain_01/Entitys/AlbumSong.cs

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+using FreeSql.DataAnnotations;
+using System;
+
+namespace domain_01.Entitys {
+	public class AlbumSong {
+
+		public Guid AlbumId { get; set; }
+
+		public Guid SongId { get; set; }
+	}
+}

Examples/domain_01/Entitys/Singer.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace domain_01.Entitys
+{
+	/// <summary>
+	/// 歌手
+	/// </summary>
+    public class Singer
+    {
+		public Guid Id { get; set; }
+
+		public string Nickname { get; set; }
+
+		public DateTime RegTime { get; set; } = DateTime.Now;
+	}
+}

Examples/domain_01/Entitys/Song.cs

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+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;
+	}
+}