The FileStream class is derived from Stream class. This class can be used for reading from and writing to files such as bytes, characters, strings, and other data-type values to a file. Other class I have used in this sample is StreamWriter. The StreamWriter class's Write and WriteLine members write to a file.

In this sample code, I have used FileStream class to create a text file and StreamWrite to write text to the text file.

namespace mcFileStream
{
using System;
using System.IO;
public class mcLogFile
{
public static void Main(String[] args)
{
// Create a text file C:\temp\mcb.txt
FileStream fs = new FileStream(@"c:\temp\mcb.txt" , FileMode.OpenOrCreate, FileAccess.Write);
StreamWriter m_streamWriter = new StreamWriter(fs);
// Write to the file using StreamWriter class
m_streamWriter.BaseStream.Seek(0, SeekOrigin.End);
m_streamWriter.Write(" File Write Operation Starts : ");
m_streamWriter.WriteLine("{0} {1}", DateTime.Now.ToLongTimeString(), DateTime.Now.ToLongDateString());
m_streamWriter.WriteLine(" First Line : Data is first line \n");
m_streamWriter.WriteLine(" This is next line in the text file. \n ");
m_streamWriter.Flush();
// Read from the file using StreamReader class
// StreamReader m_streamReader = new StreamReader(fs);
// string str = m_streamReader.ReadLine();
}
}
}