private void btnNew_Click(object sender, EventArgs e)
{
FileInfo fi = new FileInfo(this._directorySource + "\\" + this.SearchNewFileName() + ".xml");
// we create the file now with the correct format
o2Mate.Compilateur comp = new o2Mate.Compilateur();
comp.CreateFile(fi.FullName);
this._fileName = fi.Name;
this.DialogResult = DialogResult.OK;
this.Close();
}