System.Data.XmlToDatasetMap.AddColumnSchema C# (CSharp) Method

        private bool AddColumnSchema(XmlNameTable nameTable, DataColumn col, XmlNodeIdHashtable columns)
        {
            string _columnLocalName = XmlConvert.EncodeLocalName(col.ColumnName);
            string columnLocalName = nameTable.Get(_columnLocalName);           // Look it up in a name table

            if (columnLocalName == null)
            {                                       // Not found?
                columnLocalName = nameTable.Add(_columnLocalName);              // Add it
            }

            col._encodedColumnName = columnLocalName;                            // And set it back

            string columnNamespace = nameTable.Get(col.Namespace);             // Get column namespace from nametable

            if (columnNamespace == null)
            {                                       // Not found ?
                columnNamespace = nameTable.Add(col.Namespace);                 // Add it
            }
            else
            {
                if (col._columnUri != null)                                    // Update namespace
                    col._columnUri = columnNamespace;
            }
            // Create XmlNodeIdentety 
            // for this column
            XmlNodeIdentety idColumn = new XmlNodeIdentety(columnLocalName, columnNamespace);
            columns[idColumn] = col;                                            // And add it to hashtable

            if (col.ColumnName.StartsWith("xml", StringComparison.OrdinalIgnoreCase))
            {
                HandleSpecialColumn(col, nameTable, columns);
            }

            return true;
        }