C#中如何得到指定行到文件尾的每行内容？

Question

如题！

Answer 1

StreamReader sr = new StreamReader("D:\\a.txt");
            string str;
            string result = "";
            int count= 0;
            int index = 3;//指定行
            while ((str = sr.ReadLine()) != null)
            {
                if (count>= (index-1))
                {
                    result += str;
                }
                count++;
            }
            MessageBox.Show(result.ToString());

Answer 2

public string getindexstr(int index)
        {
            string[] all = File.ReadAllLines("D:\\a.txt");
            return all[index];
        }

Answer 3

理解错了
        public string getindexstr(int index)
        {
            string temp;            string[] all = File.ReadAllLines("D:\\a.txt");            for (int i = index; i < all.Length; i++)
            {
                temp += all[i];
            }
            return temp;
        }