private void svg_click(int Par_ID)
{
TreeItem Curr_Item = LocalData.dynamic_List.Single(x => x.Tree_ID == Par_ID);
if (Curr_Item.Tree_HasChildren)
{
Curr_Item.Tree_IsExpanded = !Curr_Item.Tree_IsExpanded;
LocalTreeFunctions.Cmd_ChangeVisibility(Curr_Item.Tree_ID, Curr_Item.Tree_IsExpanded, true);
}
}