Question

Im using the following to empty a txt file:

System.IO.File.WriteAllText(path, string.Empty);

The problem becomes when i run to many threads at once and they try to access the file at the same time..

Any ideas on an easy fix? 🙂

Answer 1

Multi-threading to the rescue!

You should use a Monitor, AutoResetEvent or lock block (actually it’s a Monitor) in order to synchronize access to the whole file.

public class SomeClass
{
     private readonly static object _sync = new object(); 

     public void WriteAllText()
     {
          lock(_sync)
          {
               File.WriteAllText("myfile.txt", "Hello world from a synchronized file access!!!");
          }
     }
}

}

This way you’re preventing multiple threads to access the same file at the same time.

Learn about lock block here:

http://msdn.microsoft.com/en-us/library/c5kehkcz(v=vs.110).aspx