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

有没有办法解决这个问题,还是应该放弃这种方法并采用不同的方式？

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;
                }
            }
        }
    }