Считывание файла с конца - C#

int linecount, readline = 0;
string file = "";
linecount = System.IO.File.ReadAllText("file.txt").Length;
readline = linecount - 1;
 
for (int i = 0; i != linecount; i++) 
{
file += System.IO.File.ReadLine("file.txt").First().Skip(readline) + "\r\n";
readline -= 1;
}