C# Code for Sending Email to Unresolved Recipients

this will send email to unresolved recipient.

private void SendEmailToUnresolvedRecent(IOrganizationService prmCrmService, string 
             prmToRecipientEmailAddress, Guid prmSenderUserId, string prmSubject, string prmMessageBody)
        {

            // Email record id
            Guid wod_EmailId = Guid.Empty;

            // Creating Email 'to' recipient activity party entity object
            Entity wod_EmailToReciepent = new Entity("activityparty");

            // Creating Email 'from' recipient activity party entity object
            Entity wod_EmailFromReciepent = new Entity("activityparty");

            // Assigning receiver email address to activity party addressused attribute
            //wod_EmailToReciepent["participationtypemask"] = new OptionSetValue(0);
            wod_EmailToReciepent["addressused"] = prmToRecipientEmailAddress;

            // Setting from user account
            wod_EmailFromReciepent["partyid"] = new EntityReference("systemuser", prmSenderUserId);

            // Creating Email entity object
            Entity wod_EmailEntity = new Entity("email");

            // Setting email entity 'to' attribute value
            wod_EmailEntity["to"] = new Entity[] { wod_EmailToReciepent };

            // Setting email entity 'from' attribute value
            wod_EmailEntity["from"] = new Entity[] { wod_EmailFromReciepent };

            // Setting email subject and description
            wod_EmailEntity["subject"] = prmSubject;

            wod_EmailEntity["description"] = prmMessageBody;

            // Creating email record
            wod_EmailId = prmCrmService.Create(wod_EmailEntity);

            // Creating SendEmailRequest object for sending email
            SendEmailRequest wod_SendEmailRequest = new SendEmailRequest();

            // Creating Email tracking token request object
            GetTrackingTokenEmailRequest wod_GetTrackingTokenEmailRequest = new GetTrackingTokenEmailRequest();

            // Creating Email tracking token response object to get tracking token value
            GetTrackingTokenEmailResponse wod_GetTrackingTokenEmailResponse = null;

            // Setting email record if for sending email
            wod_SendEmailRequest.EmailId = wod_EmailId;

            wod_SendEmailRequest.IssueSend = true;

            // Getting tracking token value
            wod_GetTrackingTokenEmailResponse = (GetTrackingTokenEmailResponse)
                                                 prmCrmService.Execute (wod_GetTrackingTokenEmailRequest);

            // Setting tracking token value
            wod_SendEmailRequest.TrackingToken = wod_GetTrackingTokenEmailResponse.TrackingToken;

            // Sending email
            prmCrmService.Execute(wod_SendEmailRequest);

        }