//------------------------------------------------------------------- private void CollapseTaxonToolStripMenuItem_Click(object sender, EventArgs e) { if (_MenuTaxonTreeNode == null) { return; } _MenuTaxonTreeNode.CollapseAll(); if (_MenuTaxonTreeNode.IsFiltered()) { _MenuTaxonTreeNode.GetOriginal()?.CollapseAll(); } RefreshGraph(); Goto(_MenuTaxonTreeNode); }