List Find & Findindex

static void Main(string[] args)
{
    List dataList = new List();
    for (int i=0;i<5;i++)
    {
        dataList.Add("string" + i);
    }

    string result = dataList.Find(destStr => destStr == "string10");
    int index = dataList.FindIndex(0, dataList.Count, destStr => destStr == "string10");
    int index2 = dataList.FindIndex(0, dataList.Count, destStr => destStr == "string3");
    if(index2 != -1)
        dataList.RemoveAt(index2);

    Console.ReadLine();
}

参考：

http://www.cnblogs.com/zhangchenliang/archive/2012/08/15/2640396.html