System.Xml.Schema.XmlSchemaValidator.GetDefaultAttributePrefix C# (CSharp) Method

        internal string GetDefaultAttributePrefix(string attributeNS)
        {
            IDictionary<string, string> namespaceDecls = _nsResolver.GetNamespacesInScope(XmlNamespaceScope.All);
            string defaultPrefix = null;
            string defaultNS;

            foreach (KeyValuePair<string, string> pair in namespaceDecls)
            {
                defaultNS = _nameTable.Add(pair.Value);
                if (Ref.Equal(defaultNS, attributeNS))
                {
                    defaultPrefix = pair.Key;
                    if (defaultPrefix.Length != 0)
                    { //Locate first non-empty prefix
                        return defaultPrefix;
                    }
                }
            }
            return defaultPrefix;
        }