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How to delete a file in C# that might be in use 

int retries = 5;
while (retries-- >= 0) 
{
 try 
 {
  retries = -1;
  System.IO.File.Delete(@"C:\deleteme.txt");
 }
 catch (System.IO.IOException ex) // "The specified file is in use."
 {
  // File is locked? Sleep and try again.
  System.Threading.Thread.Sleep(100); // Wait 100ms
  if (retries >= 0) continue; // go back to while loop
  throw ex; // give up
 }
}

This will also work for writing to a file, etc. This should be enclosed in a try/catch block to catch the other exceptions thrown by the System.IO.File.Delete method.
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