Исправьте код C#
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;

namespace StreamReaderExample
{
class Program
{
static void Main(string[] args)
{
Console.OutputEncoding = Encoding.GetEncoding(866);
StreamReader O = new StreamReader("c:\\users\\ den\\file.txt", System.Text.Encoding.Default);
string K;
while (O.EndOfStream != true)
{
K = O.ReadLine();
Console.WriteLine(K);
}
O.Close();
Console.ReadLine();
}
}
}