Entity这个类是要自己写的还是自动生辰的

//===================================================================================
// Microsoft Developer & Platform Evangelism
//=================================================================================== 
// THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, 
// EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES 
// OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
//===================================================================================
// Copyright (c) Microsoft Corporation.  All Rights Reserved.
// This code is released under the terms of the MS-LPL license, 
// http://microsoftnlayerapp.codeplex.com/license
//===================================================================================

namespace  xx.xx.xx.xx
{
    using System;


    /// <summary>
    /// Base class for entities
    /// </summary>
    public abstract partial class Entity
    {
        #region Members

        int? _requestedHashCode;
        Guid _Id;

        #endregion

        #region Properties

        /// <summary>
        /// Get the persisten object identifier
        /// </summary>
        public virtual  Guid Id 
        {
            get
            {
                return _Id;
            }
            protected set
            {
                _Id = value; 
 
            }
        }

        #endregion

        #region Public Methods

        /// <summary>
        /// Check if this entity is transient, ie, without identity at this moment
        /// </summary>
        /// <returns>True if entity is transient, else false</returns>
        public bool IsTransient()
        {
            return this.Id == Guid.Empty;
        }

        /// <summary>
        /// Generate identity for this entity
        /// </summary>
        public void GenerateNewIdentity()
        {
            if ( IsTransient())
                this.Id = IdentityGenerator.NewSequentialGuid();
        }

        /// <summary>
        /// Change current identity for a new non transient identity
        /// </summary>
        /// <param name="identity">the new identity</param>
        public void ChangeCurrentIdentity(Guid identity)
        {
            if ( identity != Guid.Empty)
                this.Id = identity;
        }

        #endregion

        #region Overrides Methods

        /// <summary> 
 
        /// <see cref="M:System.Object.Equals"/>
        /// </summary>
        /// <param name="obj"><see cref="M:System.Object.Equals"/></param>
        /// <returns><see cref="M:System.Object.Equals"/></returns>
        public override bool Equals(object obj)
        {
            if (obj == null || !(obj is Entity))
                return false;

            if (Object.ReferenceEquals(this, obj))
                return true;

            Entity item = (Entity)obj;

            if (item.IsTransient() || this.IsTransient())
                return false;
            else
                return item.Id == this.Id;
        }

        /// <summary>
        /// <see cref="M:System.Object.GetHashCode"/>
        /// </summary>
        /// <returns><see cref="M:System.Object.GetHashCode"/></returns>
        public override int GetHashCode()
        {
            if (!IsTransient())
            {
                if (!_requestedHashCode.HasValue)
                    _requestedHashCode = this.Id.GetHashCode() ^ 31; // XOR for random distribution (http://blogs.msdn.com/b/ericlippert/archive/2011/02/28/guidelines-and-rules-for-gethashcode.aspx) 
 

                return _requestedHashCode.Value;
            }
            else
                return base.GetHashCode();

        }

        public static bool operator ==(Entity left, Entity right)
        {
            if (Object.Equals(left, null))
                return (Object.Equals(right, null)) ? true : false;
            else
                return left.Equals(right);
        }

        public static bool operator !=(Entity left, Entity right)
        {
            return !(left == right);
        }

        #endregion
    }
}

我看到某个工程下面的这个类，请问这个类是自动生成的还是自己写的。。。。。。请详细说下。。谢谢
[解决办法]
看着应该不是自动生成的。

VS自动生成的，一般文件头部会有类似这样的注释

//------------------------------------------
// <auto-generated>
// This code was generated from a template.
//
// Manual changes to this file may cause unexpected behavior in your application.
// Manual changes to this file will be overwritten if the code is regenerated.
// </auto-generated>
//------------------------------------------

[解决办法]
看着像第三方工具生成的
[解决办法]
自动生成的