IList Remove 方法失效

转自：http://www.cnblogs.com/el-net/articles/1045825.html

Removes the first occurrence of a specific object from the IList.

方案一
This method determines equality using the default comparer Comparer<(Of<(T>)>).Default. Comparer<(Of <(T>)>).Default checks whether type Timplements System.IComparable<(Of <(T>)>) and uses that implementation, if available. If not, Comparer<(Of <(T>)>).Default checks whether type T implementsSystem.IComparable. If type T does not implement either interface, this method uses Object.Equals.

This method is an O(n) operation, where n is Count.

其实备注中已经给我指明了解决方案."this method uses Object.Equals"

所以我们重写Object.Equals方法即可.
 

  class DemoList
    {
        private string _s;
        public DemoList() { }
        public DemoList(string _s)
        {
            this._s = _s;
        }
        public string s
        {
            get { return _s; }
            set { _s = value; }
        }
        public override bool Equals(object obj)
        {     
            if (this.s == ((DemoList)obj).s)
            {
                return true;
            }
            else
            {
                return false;
            }         
        }
    }