C#

public void SelectNodeByEntity<T>(T Entity)
{
    UltraTreeNode node = GetNode(UltraTree1.Nodes, Entity);

    if (node != null)
    {
        UltraTree1.ActiveNode = node;
    }
}
private UltraTreeNode GetNode<T>(TreeNodesCollection Nodes, T Entity)
{
    UltraTreeNode retVal = null;

    foreach (UltraTreeNode node in Nodes)
    { 
        var entity = (T)node.Tag;

        if (entity == Entity)    //<====== Doesn't compile.
        {
            return node;
        }
        else
        {
            if (node.Nodes.Count > 0)
            {
                return GetNode<T>(node.Nodes, Entity);
            }
        }
    }

    return retVal;
}

public LocalSource(Control ViewingWindow)
       {
           this.ViewingWindow = ViewingWindow;
       }

private delegate void NewFrameDelegate(Bitmap NewFrame);