private void BtnApplyClick(object sender, EventArgs e)
{
AlterTemplate alterTemplate = new AlterTemplate
{
ParentTemplate = (trvTemplates.SelectedNode.Parent != null) ? trvTemplates.SelectedNode.Parent.Text : null,
TextTemplate = trvTemplates.SelectedNode.Text,
Insert = false
};
alterTemplate.SetTextTemplate();
alterTemplate.ShowDialog();
trvTemplates.SelectedNode.Text = alterTemplate.TextTemplate;
}