yes, i have found this error
System.FormatException: An invalid character was found in the mail header: ';'.
at System.Net.Mail.MailAddressParser.ParseLocalPart(String data, Int32& index, Boolean expectAngleBracket, Boolean expectMultipleAddresses)
at System.Net.Mail.MailAddressParser.ParseAddress(String data, Boolean expectMultipleAddresses, Int32& index)
at System.Net.Mail.MailAddressParser.ParseMultipleAddresses(String data)
at System.Net.Mail.MailAddressCollection.ParseValue(String addresses)
at System.Net.Mail.MailAddressCollection.Add(String addresses)
at EmailSend.Program.Main(String[] args)
How to fix it. Thanks