Optimize project catalog

Src/Asp.NetCore2/OracleTest/Demo/DemoE_CodeFirst.cs

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+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OrmTest
+{
+    public class DemoE_CodeFirst
+    {
+        public static void Init()
+        {
+            Console.WriteLine("");
+            Console.WriteLine("#### CodeFirst Start ####");
+            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
+            {
+                DbType = DbType.Oracle,
+                ConnectionString = Config.ConnectionString3,
+                InitKeyType = InitKeyType.Attribute,
+                IsAutoCloseConnection = true
+            });
+            db.CodeFirst.InitTables(typeof(CodeFirstTable1));//Create CodeFirstTable1 
+            db.Insertable(new CodeFirstTable1() { Name = "a", Text="a" }).ExecuteCommand();
+            var list = db.Queryable<CodeFirstTable1>().ToList();
+            Console.WriteLine("#### CodeFirst end ####");
+        }
+    }
+
+    public class CodeFirstTable1
+    {
+        [SugarColumn(OracleSequenceName ="SEQ_ID", IsPrimaryKey = true)]
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public string Text { get; set; }
+        [SugarColumn(IsNullable = true)]
+        public DateTime CreateTime { get; set; }
+    }
+}