How to append text to a file?

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How to append text to a file?

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The steps to append text to a file are as follows:

1. Implement the System.IO namespace using the following code.
   
   using System.IO;
   
   
2. Create a StreamWriter class object and initialize it with a file name.
   
   StreamWriter sw = File.AppendText("TestFile.txt");
   or
   StreamWriter sw;
   sw = File.AppendText("TestFile.txt");
   
   
3. Append text to the file using Write() or WriteLine() method of StreamWriter class.
   
   sw.Write("This is my first Line to the file");
   sw.Write("This is my second Line to the file");
   sw.Write("This is my third line to the file");
   sw.WriteLine("This is my fourth line to the file");
   
   
4. Close the StreamWriter class.
   
   sw.Close();
   

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