C#中Dictionary,如果键为对象时，怎么比较！

[浑沌滴年代]

当字典中的键为对象时，直接用ContainsKey不可以，当向字典中增加的时候，有同样的对象但还是可以加进去，是不是要重写什么东西？？？具体如何实现！！！？？？

[孟子E章]

对象按地址引用的，要进行比较，你需要重写 Equals
可参考
http://blog.csdn.net/aladdinty/article/details/3400837

[ycg_893]

如果是同一对象可直接Equals
但如果是不同的对象,但值一样与必须重写 Equals

[阿非]

需要重写 Equals 和 GetHashCode 两个方法

[bustersword]

/// <summary>
    /// A result is a search result which contains a post and its ranking.
    /// </summary>
    internal class Result : IComparable<Result>
    {
        #region Constants and Fields

        /// <summary>
        ///     The post of the result.
        /// </summary>
        internal IPublishable Item;

        /// <summary>
        ///     The rank of the post based on the search term. The higher the rank, the higher the post is in the result set.
        /// </summary>
        internal int Rank;

        #endregion

        #region Public Methods

        /// <summary>
        /// Returns a hash code for this instance.
        /// </summary>
        /// <returns>
        /// A hash code for this instance, suitable for use in hashing algorithms and data structures like a hash table. 
        /// </returns>
        public override int GetHashCode()
        {
            return this.Item.Id.GetHashCode();
        }

        #endregion

        #region Implemented Interfaces

        #region IComparable<Result>

        /// <summary>
        /// Compares the current object with another object of the same type.
        /// </summary>
        /// <param name="other">
        /// An object to compare with this object.
        /// </param>
        /// <returns>
        /// A 32-bit signed integer that indicates the relative order of the objects being compared. The return value 
        ///     has the following meanings: Value Meaning Less than zero This object is less than the other parameter.Zero 
        ///     This object is equal to other. Greater than zero This object is greater than other.
        /// </returns>
        public int CompareTo(Result other)
        {
            return other.Rank.CompareTo(this.Rank);
        }

        #endregion

        #endregion
    }

看看

[浑沌滴年代]

还是自己想出来了。。。结帐

[浑沌滴年代]

[Quote=引用 1 楼 net_lover 的回复:]

对象按地址引用的，要进行比较，你需要重写 Equals
可参考
http://blog.csdn.net/aladdinty/article/details/3400837
[/Quote]

if (dic.ContainsKey(_bsMod))//如果集合中包含此对象，直接返回Table

如果我要像这样写，该怎么实现。。。。。