StreamReader.ReadLine will hang in an infinite loop

Question

I have a simple program to read a file using the StreamReader and process it line by line. But the file I am reading may sometimes locate in a network folder. I came across while doing some testing with such a file, that if the network connection lost at some point while I am reading, it'll stay in the same line again and again looping in an infinite loop by resulting the same line as the result from stream.ReadLine().

Is there a way I can find when the fileHandle is not available from the stream itself? I was expecting a FileNotAvailableException kind of an exception would fire when the filehandle is lost from the StreamReader.

Here's my code snippet...

        string file = @"Z://1601120903.csv"; //Network file
        string line;
        StringBuilder stb = new StringBuilder();      
        StreamReader stream = new StreamReader(file, Encoding.UTF8, true, 1048576);
        do
        {
            line = stream.ReadLine();
            // Do some work here
        } while (line != "");

Answer 1

Correct approach 1 (EndOfStream) :

using(StreamReader sr = new StreamReader(...)) {
    while(!sr.EndOfStream) {
        string line = sr.ReadLine();
        Console.WriteLine(line);
    }
}

Correct approach 2 (Peek)

using(StreamReader sr = new StreamReader(...)) {
    while(sr.Peek() >= 0) {
        string line = sr.ReadLine();
    }
}

Note: that it is incorrect to threat an empty string as end of file.

if the network connection lost at some point while I am reading, it'll stay in the same line again and again looping in an infinite loop by resulting the same line as the result from stream.ReadLine()

I've checked this scenario right now - the System.IO.IOException ("The network path was not found."} should be thrown in this case.

Wrapping this with a try catch block will not fix my problem, will it?

In this case you can break the reading as follows:

string line;
do {
    try {
        line = sr.ReadLine();
        // Do some work here
    }
    catch(System.IO.IOException) {
        break; 
    }
} while(line != null);