class Program
    {
        static string attfile = @"C:\Users\a.kravchenko.AYS\Desktop\123.xlsx";
        static Excel.Application excelApp = new Excel.Application();
        static Excel.Workbook excelBook;

        static void Main(string[] args)
        {
            exceling();
        }

        static void exceling()
        {
            excelApp.Visible = false;
            excelBook = excelApp.Workbooks.Open(attfile);
            Hyperlnking();
            excelBook.Save();
            excelBook.Close(0);
            excelApp.Quit();

        }

        public static void Hyperlnking()
        {  
            try
            {
                foreach (Excel.Range objC in excelBook.Sheets[1].Range("A2:A5"))
                {
                    if (objC.Value == null) continue;
                    objC.FormulaLocal = "=ГИПЕРССЫЛКА(" + objC.Value + ")";
                }
            }
            catch (Exception ex) { }

        }
    }