how to write text into notepad file

 class WriteTextFile
    {
        static void Main()
        {
            // These examples assume a "C:\Users\Public\TestFolder" folder on your machine.
            // You can modify the path if necessary.
            // Example #1: Write an array of strings to a file.
            // Create a string array that consists of three lines.
            string[] lines = {"First line", "Second line", "Third line"};
            System.IO.File.WriteAllLines(@"C:\Users\Public\TestFolder\WriteLines.txt", lines);

            // Example #2: Write one string to a text file.
            string text = "A class is the most powerful data type in C#. Like structures, " +