In C#, Files can be created and deleted using classes in System.IO
namespace. Reading a file, writing to a file and closing a file are set of operations related to I/O.
FileInfo fileInfo = new FileInfo(@"output.txt");
FileStream fileStream = fileInfo.Open(FileMode.OpenOrCreate, FileAccess.Write, FileShare.Read );
StreamWriter streamWriter = new StreamWriter(fileStream);
streamWriter.WriteLine("printing the output to a file");
streamWriter.Close();