What is the use of StreamWriter in C#?

Answer:

StreamWriter is a class used in Dot Net to write Text into files.As name suggests it writes data to a byte stream.Actually it implements a System.IO.TextWriter class that writes characters to a byte stream in a particular encoding.

We have to give a proper file path in its constructor otherwise it will give FileNotFound error.

Syntax:

DirectoryInfo[] dirs = new DirectoryInfo(@"c:\").GetDirectories();

           

using (StreamWriter sw = new StreamWriter("name_of_the_file"))

{

     foreach (DirectoryInfo dir in dirs)

     {

         sw.WriteLine(dir.Name);

     }

}