Using Array.GetLength() ?

Hi all, i am trying to write a little code that goes through a loop while a count is less than a 2d array's (0th) postion,
here is my code

            string[,] Products;
           
            DataRow[] foundRows = myDataTable.Select();

            for (int i = 0; i < foundRows.Count(); i++)
            {
               
                int thecount = 0;
                bool FoundResult = false;
                while (thecount < Products.GetLength(0))
                {
                    if (Products[i, 0] == foundRows[i][3].ToString())
                    {
                        int tempint = int.Parse(Products[thecount, 1].ToString());
                        tempint++;
                        Products[thecount, 1] = tempint.ToString();
                        FoundResult = true;
                        break;
                    }
                    else
                    {
                      
                    }

                    thecount++;
                }

This all looks good to me, but when i run the code it throws up the error
"Error    1    Use of unassigned local variable 'Products'
The bit underlined where its happening... any ideas ?
the array needs to be dynamic.. since i add to it as its searching

Thanks in advance..