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

        internal DataColumn FindField(DataTable table, string field)
        {
            bool attribute = false;
            string colName = field;

            if (field.StartsWith("@", StringComparison.Ordinal))
            {
                attribute = true;
                colName = field.Substring(1);
            }

            string[] split = colName.Split(':');
            colName = split[split.Length - 1];

            colName = XmlConvert.DecodeName(colName);
            DataColumn col = table.Columns[colName];
            if (col == null)
                throw ExceptionBuilder.InvalidField(field);

            bool _attribute = (col.ColumnMapping == MappingType.Attribute) || (col.ColumnMapping == MappingType.Hidden);

            if (_attribute != attribute)
                throw ExceptionBuilder.InvalidField(field);

            return col;
        }