void save()
{
FileLoader fl = new FileLoader();
ProjectConfig pc = new ProjectConfig();
pc.Name = txtName.Text;
pc.XmlNameSpace = txtNS.Text;
pc.GUID = _guid;
pc.HelpFile = txtHelp.Text;
pc.Icon = txtIcon.Text;
if( ((Set)_project.Tag).Groups.Count > 0 )
pc.Sets.Add( _project.Tag );
if( ((Set)_file.Tag).Groups.Count > 0 )
pc.Sets.Add( _file.Tag );
if( ((Set)_folder.Tag).Groups.Count > 0 )
pc.Sets.Add( _folder.Tag );
fl.Save(_filename, pc);
enableButtons();
}