private void btnNodeSelected_Click(object sender, EventArgs e)
{
if (dgNodes.SelectedRows.Count > 0)
{
int rowIndex = dgNodes.SelectedRows[0].Index;
MyNode node = _nodes[rowIndex];
MyNode nodeSelected = node.Clone();
_nodesSelected.Add(node);
dgNodes.Refresh();
showSelectedNodes();
if (dgNodesSelected.Rows.Count > 0)
{
dgNodesSelected.Rows[dgNodesSelected.Rows.Count - 1].Selected = true;
}
}
}