Unable to write to my text file in C#

Question

The following code does not write to a text file. Unsure as to why, as I am following my book exactly, to my knowledge. No errors are thrown at run-time, the program runs successfully. The file path is correct and the file mentioned is not currently open

String databasePath = "C:\\Users\\Dalton.Riera\\Downloads\\Summer Program Practice 0 Solution Extr\\Summer Program Practice 0 Solution\\DataBase.txt";
StreamWriter Writer = new StreamWriter(new FileStream(databasePath, 
    FileMode.Append, FileAccess.Write));
Writer.WriteLine("Test");
Console.ReadKey();
Writer.Close();

Answer 1

If you want to append, just AppendAllText:

   string databasePath = "C:\\Users\\Dalton.Riera\\Downloads\\Summer Program Practice 0 Solution Extr\\Summer Program Practice 0 Solution\\DataBase.txt";

   File.AppendAllText(databasePath, "Test");

In case you insist on Writer close it before Console.ReadKey (when you check the file)

// first write into the file
//DONE: do not close IDisposable explicitly, but wrap them into "using"
using (StreamWriter Writer = new StreamWriter(
  new FileStream(databasePath, 
                 FileMode.Append, 
                 FileAccess.Write))) {
  Writer.WriteLine("Test");
} 

// ... then stop and check file's content
Console.ReadKey();