Read file that's already used by another process

Question

I have a C# app that tries to read a log file which is being written to by another app. When I try to read the file, I get IOException

"The process cannot access the file ... because it is being used by another process."

What I tried using so far are the following, but none of them fix the problem

var log = File.ReadAllText(logPath);

var stream = new FileStream(logPath, FileMode.Open);

using (var stream = File.Open(logPath, FileMode.Open))
  {

  }

Answer 1

try this:

FileStream logFileStream = new FileStream("c:\test.txt", FileMode.Open,   FileAccess.Read, FileShare.ReadWrite);
StreamReader logFileReader = new StreamReader(logFileStream);

while (!logFileReader.EndOfStream)
{
    string line = logFileReader.ReadLine();
    // Your code here
}

// Clean up
logFileReader.Close();
logFileStream.Close();

edited with MethodMan's suggestions

using(FileStream logFileStream = new FileStream(@"c:\test.txt", FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
    using(StreamReader logFileReader = new StreamReader(logFileStream))
    {
        string text = logFileReader.ReadToEnd();
        // Your code..
    }
}