IfcDoc.CtlRules.toolStripButtonSetDefault_Click C# (CSharp) Method

        private void toolStripButtonSetDefault_Click(object sender, EventArgs e)
        {
            TreeNode tnSelect = this.treeViewTemplate.SelectedNode;
            if(tnSelect.Tag is DocModelRuleEntity)
            {
                DocModelRuleEntity rule = (DocModelRuleEntity)tnSelect.Tag;
                rule.Identification = "Value";
            }
            else if(tnSelect.Tag is DocModelRuleAttribute)
            {
                DocModelRuleAttribute rule = (DocModelRuleAttribute)tnSelect.Tag;
                rule.Identification = "Name";
            }

            if (this.ContentChanged != null)
            {
                this.ContentChanged(this, EventArgs.Empty);
            }
        }