using System;

using System.Data;

using System.Xml;

​

public class Program

{

    // convert a type array to a string

    // initialize and assign the array to the "host" 

    // and hold the value throughout the if statement. 

    public static string SomeMethod(DataRow row)

    {

        if (row.Table.Columns.Contains("DataRow") && !Convert.IsDBNull(row["DataRow"]))

        {

            var array = row["DataRow"].ToString().ToCharArray();

            for (var i = 0; i < array.Length; ++i)

            {

                DataRow = new byte[array.Length];

                byte rowData;

                if (Byte.TryParse(array[i].ToString(), out rowData))

                {

                    DataRow[i] = rowData;

                }

                else

                {

                    return null;

                }

            }

​

        }

​

        return null;

    }

​

    public static byte[] DataRow;

    public static void Main()

    {

        var dt = new DataTable();

        dt.Columns.Add("DataRow");

        var row = dt.NewRow();

        row["DataRow"] = 00100100100100101;

        dt.Rows.Add(row);

        SomeMethod(dt.Rows[0]);

    }

}