c# - StreamWriter.Write doesn't write to file; no exception thrown

Question

My code in C# (asp.net MVC)

StreamWriter tw = new StreamWriter("C:\mycode\myapp\logs\log.txt");

// write a line of text to the file
tw.Write("test");

The file is created but is empty. No exception is thrown. I have never seen this before and I am stuck here; I just need to write some debugging output.

Please advise.

Answer 1

StreamWriter is buffered by default, meaning it won't output until it receives a Flush() or Close() call.

You can change that by setting the AutoFlush property, if you want to. Otherwise, just do:

StreamWriter tw = new StreamWriter("C:\mycode\myapp\logs\log.txt");

// write a line of text to the file
tw.Write("test");
tw.Close();  //or tw.Flush();