private void AddGroup()
{
var group = new Group();
var groupForm = new CreateGroup(ref group);
groupForm.ShowDialog();
}
private void BtnEditGroup_Click(object sender, EventArgs e)
{
var group = ((MemberWithGroup)TvGroupsMembers.SelectedObject).Group;
var editGroup = new CreateGroup(ref group);
editGroup.ShowDialog();
((MemberWithGroup)TvGroupsMembers.SelectedObject).GroupName = group.Name;
TvGroupsMembers.UpdateObject((MemberWithGroup)TvGroupsMembers.SelectedObject);
}