System.Data.XSDSchema.GetTableNamespace C# (CSharp) Method

        private string GetTableNamespace(XmlSchemaIdentityConstraint key)
        {
            string xpath = key.Selector.XPath;
            string[] split = xpath.Split('/');
            string prefix = string.Empty;

            string QualifiedTableName = split[split.Length - 1]; //get the last string after '/' and ':'

            if ((QualifiedTableName == null) || (QualifiedTableName.Length == 0))
                throw ExceptionBuilder.InvalidSelector(xpath);

            if (QualifiedTableName.IndexOf(':') != -1)
                prefix = QualifiedTableName.Substring(0, QualifiedTableName.IndexOf(':'));
            else
                return GetMsdataAttribute(key, Keywords.MSD_TABLENS);

            prefix = XmlConvert.DecodeName(prefix);

            return GetNamespaceFromPrefix(prefix);
        }