private void cbRoles_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (this.cbRoles.SelectedValue == null)
return;
ProjectFolderRole role = (ProjectFolderRole) this.cbRoles.SelectedValue;
if (this._ProjectItem.IsFolder)
{
ProjectFolderInfo folder = (ProjectFolderInfo)this._ProjectItem;
folder.ProjectFolderRole = role;
this.SetChildProperties(folder);
}
this.SetVisibility(role);
}