2 column csv file to 2 dim array

[Muddy]

Im new to C# and was wondering if there was a more elegant way to do the following:
thanks in advance for any help!

if (ofd1.ShowDialog() == DialogResult.OK)
            {
                System.IO.StreamReader objFile = new System.IO.StreamReader(ofd1.FileName);
                string[] arrFirst = objFile.ReadToEnd().Split(Environment.NewLine.ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
                
                objFile.Close();
                objFile.Dispose();
                //int intUB = arrFirst.GetUpperBound(0);
                string[,] arrSecond;
                arrSecond = new string[ arrFirst.GetUpperBound(0),2];
                string[] arrTemp;
                arrTemp = new string[1];
 
                for (int intCounter = 0; intCounter <= arrFirst.GetUpperBound(0) - 1; intCounter++)
                {
                    arrTemp = arrFirst[intCounter].Split(',');
                    arrSecond[ intCounter,0] = arrTemp[0];
                    arrSecond[intCounter,1] = arrTemp[1];
                }
 
 
            }