Nalezení elementu v XSD

gistfile1.cs

        IEnumerable<XmlSchemaElement> FindElements(XmlSchemaObjectCollection items, string elementName)
        {
            foreach (XmlSchemaObject item in items)
            {
                var el = item as XmlSchemaElement;
                if (el != null && el.Name == elementName)
                    return new[] { el };

                var ct = item as XmlSchemaComplexType ?? el.SchemaType as XmlSchemaComplexType;
                if (ct == null)
                    continue;

                var sq = ct.Particle as XmlSchemaGroupBase;
                if (sq != null)
                {
                    var findElements = FindElements(sq.Items, elementName);
                    if (findElements.Any())
                        return findElements;
                }
            }
            return Enumerable.Empty<XmlSchemaElement>();
        }