add examples domain_01

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;
+	}
+}