FileSystemWatcher causes user limit exceptions on Kubuntu Linux

public static void Init(string ProjectPath, List <ProjectFile> ProjectFileList, List <ProjectDirectory> ProjectDirList, List <Icon> IconList)
{
    ProjectFiles = ProjectFileList;
    ProjectDirs = ProjectDirList;
    Icons = IconList;

    FSWatcher.BeginInit();
    FindItemsInProjectDirectory(null, null);

    FSWatcher.IncludeSubdirectories = true;
    FSWatcher.EnableRaisingEvents = true;
    FSWatcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;
    FSWatcher.Changed += new FileSystemEventHandler(FindItemsInProjectDirectory);
    FSWatcher.Created += new FileSystemEventHandler(FindItemsInProjectDirectory);
    FSWatcher.Deleted += new FileSystemEventHandler(FindItemsInProjectDirectory);
    FSWatcher.Renamed += new RenamedEventHandler(FindItemsInProjectDirectory);
    FSWatcher.Path = ProjectPath;
    FSWatcher.EndInit();
}