var watcher = new FileSystemWatcher
                        {
                            Path = p,
                            IncludeSubdirectories = true,
                            NotifyFilter =
                                NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.FileName |
                                NotifyFilters.DirectoryName
                        };
                        
                        watcher.Renamed += OnRenamed;

.
.
.

private static void OnRenamed(object source, RenamedEventArgs e)
{
    string newPath = e.FullPath;
    string FullPath = e.OldFullPath;
}