Recursively retrieve the height of a tree

/// <Summary>
/// Calculate the number of layers of a node in a tree
/// </Summary>
/// <Returns> </returns>
Public int getnodelevelcount (treenode tvnode)
{
If (tvnode = NULL)
Return 0;
If (tvnode. nodes. Count <= 0)
Return 1;

Int childrenmaxcount = 0;
Foreach (treenode node in tvnode. nodes)
{
If (childrenmaxcount <= gettreelevelcount (node) // recursively obtain the highest subnode
Childrenmaxcount = gettreelevelcount (node );
}
Return childrenmaxcount + 1; // return
}
/// <Summary>
/// Calculate the height of a tree
/// </Summary>
/// <Param name = "TV"> </param>
/// <Returns> </returns>
Public int gettreelevelcount (Treeview TV)
{
If (TV = NULL)
Return 0;
If (TV. nodes. Count <= 0)
Return 0;
Int maxcount = 0;
Foreach (treenode node in TV. nodes)
{
If (maxcount <= getnodelevelcount (node ))
Maxcount = getnodelevelcount (node );
}
Return maxcount;
}