"Exception Type: MissingMethodException" error displayed for SMTP mail message

I am trying to send email with SMTP. I have added all the necessary information for SMTP mail Message. But when i run the program i am getting Missing method exception

Following are the images for SMTP port, host and The error message displayed
smtpHosterror_methodMissing

Please help me solving this error

Thanks

Hi @Shantanu.kulkarni,

i hope you are not having the latest .net framework
Refer below link

Regards,
Arivu

Hi @arivu96,

Thanks For Quick response.

yes i have installed .NET Framework 4.6.1 on my machine.

HI @Shantanu.kulkarni,
Refer this,

Regards,
Arivu

Hi @arivu96

As per above link i have install MimeKit 1.2.7.0
But still i am facing same problem