代码修改后的版本，全部提交

Mtxfw.Model/Guest.cs

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+using System;
+namespace Mtxfw.Model
+{
+    /// <summary>
+    /// Guest:实体类(属性说明自动提取数据库字段的描述信息)
+    /// </summary>
+    [Serializable]
+    public partial class Guest
+    {
+        public Guest()
+        { }
+        #region Model
+        private int _id;
+        private string _guestname;
+        private string _GuestContact;
+        private string _message;
+        private string _message2;
+        private DateTime? _createtime;
+        private int? _businessid = 0;
+        private int? _userid = 0;
+        private int? _userid2 = 0;
+        private int? _isshow = 0;
+        private int? _isshow2 = 0;
+        private int _starlevel = 0;
+        private int _ttype = 0;//0为评论，1为问答,2为留言
+        /// <summary>
+        /// 
+        /// </summary>
+        public int ID
+        {
+            set { _id = value; }
+            get { return _id; }
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        public string GuestName
+        {
+            set { _guestname = value; }
+            get { return _guestname; }
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        public string GuestContact
+        {
+            set { _GuestContact = value; }
+            get { return _GuestContact; }
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        public string Message
+        {
+            set { _message = value; }
+            get { return _message; }
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        public string Message2
+        {
+            set { _message2 = value; }
+            get { return _message2; }
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        public DateTime? CreateTime
+        {
+            set { _createtime = value; }
+            get { return _createtime; }
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        public int? BusinessID
+        {
+            set { _businessid = value; }
+            get { return _businessid; }
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        public int? userid
+        {
+            set { _userid = value; }
+            get { return _userid; }
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        public int? userid2
+        {
+            set { _userid2 = value; }
+            get { return _userid2; }
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        public int? IsShow
+        {
+            set { _isshow = value; }
+            get { return _isshow; }
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        public int? IsShow2
+        {
+            set { _isshow2 = value; }
+            get { return _isshow2; }
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        public int starlevel
+        {
+            set { _starlevel = value; }
+            get { return _starlevel; }
+        }
+        /// <summary>
+        /// 
+        /// </summary>
+        public int ttype
+        {
+            set { _ttype = value; }
+            get { return _ttype; }
+        }
+        #endregion Model
+
+    }
+}