I dont feel this is the perfect solution, but I was able to get the results I wanted. Basically formatted the column with string.Format("=\"{0}\"", content.account_no)); But I had to interate through the rows
int curretCol = System.Array.FindIndex<string>(clmAry, (string r) => r.ToString() == "account_no");
int currentrow = 1;
foreach (GLSearchDC content in GLList)
{
Cell cell = worksheet.Cells[CellsHelper.CellIndexToName(currentrow++, curretCol)];
cell.PutValue(string.Format("=\"{0}\"", content.Account_No));
content.account_no));
}