private void ReadBindingExpression(XmlNode bindingNode) { var constraintIdAttribute = bindingNode.Attributes["id"]; var constraintId = constraintIdAttribute.Value; var expression = string.Empty; for (var i = 0; i < bindingNode.ChildNodes.Count; i++) { var childNode = bindingNode.ChildNodes[i]; switch (childNode.Name) { case "expression": expression = childNode.InnerText; break; } } var newBinding = new VisualizerBindingExpressionModel(expression); newBinding.Id = Convert.ToInt32(constraintId); _display.AddBindingExpression(newBinding); }