Open Text File in C#

The OpenText method opens an existing UTF-8 encoded text file for reading. The OpenText method takes a file name as a parameter and returns a StreamReader object.

StreamReader reader = File.OpenText(fileName);

Once we have a StreamReader object, we can use its Read or ReadLine methods to read the contents. The ReadLine method reads one line at a time. The following code snippet loops through the entire content of a SteamReader and reads and prints one line at a time.

while ((s = reader.ReadLine()) != null)
{
    Console.WriteLine(s);
}

The following lists the complete code sample.

string fileName = @"C:\Temp\MaheshTX.txt";
try
{
    using (StreamReader reader = File.OpenText(fileName))
    {
        string s = "";
        while ((s = reader.ReadLine()) != null)
        {
            Console.WriteLine(s);
        }
    }
}
catch (Exception Ex)
{
    Console.WriteLine(Ex.ToString());
}