I am trying to write a couple of extensions to convert UniDataSets and UniRecords to DataSet and DataRow but I get the following error when I try to compile.

'System.Data.DataRow.DataRow(System.Data.DataRowBuilder)' is inaccessible due to its protection level

Is there any way to fix this or should I abandon this approach and come at it a different way?

    using System;           
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Data;
    using IBMU2.UODOTNET;
    namespace Extentions
    {
        public static class UniDataExtentions
        {
            public static System.Data.DataSet ImportUniDataSet(this System.Data.DataSet dataSet, IBMU2.UODOTNET.UniDataSet uniDataSet)
            {
                foreach (UniRecord uniRecord in uniDataSet)
                {
                    DataRow dataRow = new DataRow();
                    dataRow.ImportUniRecord(uniRecord);
                    dataSet.Tables[0].ImportRow(dataRow);
                }
                return dataSet;
            }
            public static void ImportUniRecord(this System.Data.DataRow dataRow, IBMU2.UODOTNET.UniRecord uniRecord)
            {
                int fieldCount = uniRecord.Record.Dcount();
                // ADD COLUMS
                dataRow.Table.Columns.AddRange(new DataColumn[fieldCount]);
                // ADD ROW
                for (int x = 1; x < fieldCount; x++)
                {
                    string stringValue = uniRecord.Record.Extract(x).StringValue;
                    dataRow[x] = stringValue;
                }
            }
        }
    }