private void BtnFileGroup_Click(object sender, EventArgs e)
{
var fileHead = new FileOverhead();
var createFileGroup = new CreateFilegroup(ref fileHead);
createFileGroup.ShowDialog();
}
private void filegroupToolStripMenuItem_Click(object sender, EventArgs e)
{
var filegroup = ((FileWithOverhead)TvFiles.SelectedObject).FileOverhead;
var editFilegroup = new CreateFilegroup(ref filegroup);
editFilegroup.ShowDialog();
((FileWithOverhead)TvFiles.SelectedObject).FileOverhead = filegroup;
TvFiles.RefreshObject((FileWithOverhead)TvFiles.SelectedObject);
}