How to touch a file in C#?

Question

In C#, what's the simplest/safest/shortest way to make a file appear as though it has been modified (i.e. change its last modified date) without changing the contents of the file?

Answer 1

System.IO.File.SetLastWriteTimeUtc(fileName, DateTime.UtcNow); 

If you don't know whether the file exists, you can use this:

if(!System.IO.File.Exists(fileName))      System.IO.File.Create(fileName).Close();   // close immediately   System.IO.File.SetLastWriteTimeUtc(fileName, DateTime.UtcNow)