public void ListFilesExecutionTime()
{
var dir = new System.IO.DirectoryInfo("U:\\");
var exceptions = new ConcurrentBag <Exception>();
var timeBefore = DateTime.Now;
dir.ListAllFilesParallel((file) => { }, exceptions.Add);
var timeAfter = DateTime.Now;
var timeDiff = timeAfter - timeBefore;
System.Diagnostics.Debug.WriteLine("Test: " + "ListFilesExecutionTime");
System.Diagnostics.Debug.WriteLine("Number of erros " + exceptions.Count);
System.Diagnostics.Debug.WriteLine("Started at " + timeBefore);
System.Diagnostics.Debug.WriteLine("Finished at " + timeAfter);
System.Diagnostics.Debug.WriteLine("Diff " + timeDiff);
}