{System.ArgumentOutOfRangeException: Index and length must refer to a location within the string.
Parameter name: length
at System.String.Substring(Int32 startIndex, Int32 length)
at ActiveUp.Net.Mail.Fetch.ExtractMessageFromReponse(String response)
at ActiveUp.Net.Mail.Fetch.MessageString(Int32 messageOrdinal)
at ActiveUp.Net.Mail.Mailbox.SearchParse(String query)
...
}
Suddenly I have this exception after few days of app working fine