Name does not exist in current context of code (error message)

[brat33]

I inheritede some code, and am making minor changes (email name changes) to the code, and want to recompile to another server.

I am getting this error:
"The name 'H39FE001E' does not exist in the current context"
On this line of code:
"emailSender.Fields(&H39FE001E);

This is the code:

 private string GetEmailAddress(AddressEntry emailSender)
        {
            string exchangeAddress = emailSender.Address.ToString().ToLower();
            emailSender.Fields(&H39FE001E);
 
            int aliasStart = exchangeAddress.LastIndexOf("=") + 1;
            int aliasLength = exchangeAddress.Length - aliasStart;
 
            if (aliasStart > 0) 
            {
                string alias 
                    = exchangeAddress.Substring(aliasStart, aliasLength);
                WriteToLog(exchangeAddress);
                if (exchangeAddress.Contains("compWorld")) {
                    return String.Format("{0}@emailAddressHere.com", alias);
                } else {
                    return String.Format("{0}@emailAddressHere.com", alias);
                }
            } 
            else 
            {
                WriteToLog(
                    "Sender email not determined -> " + 
                    exchangeAddress
                );
 
                // email address could not be determined, return a generic one
                return "unknown@emailAddressHere";
            }
        }
 

Thanks in advance for any assistance.