how to find string in a text file c# code example

Example: how to find string in a text file c#

private void button1_Click(object sender, EventArgs e)        {            string line;            // Read the file and display it line by line.            System.IO.StreamReader file =               new System.IO.StreamReader("c:\\test.txt");            while ((line = file.ReadLine()) != null)            {                Console.WriteLine(line);                string[] lineStrings = line.Split(new char[]{','},StringSplitOptions.RemoveEmptyEntries);                if (lineStrings.Length > 2)                {                    if (lineStrings[0] == txt1.Text)                    {                        txt2.Text = lineStrings[1];                        txt3.Text = lineStrings[2];                        return;                    }                }            }            file.Close();            // Suspend the screen.            Console.ReadLine();        }