how to upgrading my .net framework to 4.0 to 4.5 for seding mail

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Hello,

how can i update my .net framework 4.0 visual stdio 2010 ultimate to .net
4.5 visual stdio 2012

System.Net.Mail.SmtpException: Failure sending mail. ---> System.IndexOutOfRangeException: Index was outside the bounds of the array. at System.Net.Base64Stream.EncodeBytes(Byte[] buffer, Int32 offset, Int32 count, Boolean dontDeferFinalBytes, Boolean shouldAppendSpaceToCRLF) at System.Net.Base64Stream.Write(Byte[] buffer, Int32 offset, Int32 count) at System.Net.Mime.MimePart.Send(BaseWriter writer) at System.Net.Mime.MimeMultiPart.Send(BaseWriter writer) at System.Net.Mail.Message.Send(BaseWriter writer, Boolean sendEnvelope) at System.Net.Mail.SmtpClient.Send(MailMessage message) --- End of inner exc

Posted 16-Feb-15 22:56pm

sadhana4

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2015-02-16T23:36:00

Solution 1

Here is the fix - FIX: "Failure sending mail" error message when you send an email message by using a .NET Framework 4.0-based application that uses the "System.Net.Mail.SmtpClient" class if the email attachment is larger than 3 MB[^].

Posted 16-Feb-15 23:36pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

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sadhana4 17-Feb-15 7:12am

To download this hotfix, you can also visit the following Microsoft website:
https://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=30226

when i clicked this link i enter my username and password
then it comes with page not found

sadhana4 17-Feb-15 7:12am

i am unable to upload hotfix

sadhana4 17-Feb-15 7:18am

i got this message

Page Not Found

The content that you requested cannot be found or you do not have permission to view it.

If you believe you have reached this page in error, click the Help link at the top of the page to report the issue and include this ID in your e-mail: 80a345ed-a8b5-4b37-b697-f289739572edr

sadhana4 17-Feb-15 7:18am

plz help how to get out this issue

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 17-Feb-15 8:57am

Why don't you try the "WORKAROUND" given in that link? Otherwise, you have to raise a question to the Microsoft Support to get that fix.