Sending Email in C# using CRM

public bool SendemailCRM(string ToGuID,string CCGuID,string BCCGuID,string strSubject,string strBody)
        {
            Guid emailID = new Guid();
            bool success=false;
            try
            {
 
                CrmService service = new CrmService();
                service.Credentials = System.Net.CredentialCache.DefaultCredentials;
                ws_crm.email email = new email();//Creating the email request
 
                #region Get the ID of the system user.
                WhoAmIRequest userRequest = new WhoAmIRequest();
                WhoAmIResponse user = (WhoAmIResponse)service.Execute(userRequest);
                #endregion
 
                #region Activity for From Email id
                ws_crm.activityparty FromParty = new activityparty();
                FromParty.partyid = new Lookup();
                FromParty.partyid.type = EntityName.systemuser.ToString();
                FromParty.partyid.Value =  user.UserId;
                #endregion
 
                #region Activity for From Email id
                ws_crm.activityparty ToParty = new activityparty();
                ToParty.partyid = new Lookup();
                ToParty.partyid.type = EntityName.contact.ToString();
                ToParty.partyid.Value = new Guid(ToGuID);
                #endregion
 
               
 
 
                #region  Create an email message.
                email.to = new activityparty[] { ToParty };
                email.from = new activityparty[] { FromParty };
 
                if (CCGuID.Trim() != "")
                {
                    #region Activity for CC Email id
                    ws_crm.activityparty CCParty = new activityparty();
                    CCParty.partyid = new Lookup();
                    CCParty.partyid.type = EntityName.contact.ToString();
                    CCParty.partyid.Value = new Guid(CCGuID);
                    #endregion
                    email.cc = new activityparty[] { CCParty };
 
                }
 
                if (BCCGuID.Trim() != "")
                {
                    #region Activity for BCC Email id
                    ws_crm.activityparty BCCParty = new activityparty();
                    BCCParty.partyid = new Lookup();
                    BCCParty.partyid.type = EntityName.systemuser.ToString();
                    BCCParty.partyid.Value = user.UserId;
                    #endregion
                    email.cc = new activityparty[] { BCCParty };
                }
 
 
 
                // Set email properties
 
                email.subject = strSubject;
                email.description = strBody;
 
 
 
                CrmBoolean direction = new CrmBoolean();
                direction.Value = true;
                email.directioncode = direction;
                #endregion
 
                #region  Create an Response
 
                TargetCreateEmail targetCreate = new TargetCreateEmail();
                targetCreate.Email = email;
 
                CreateRequest request = new CreateRequest();
                request.Target = targetCreate;
 
                CreateResponse response = (CreateResponse)service.Execute(request);
                emailID = response.id;
 
                #endregion
 
 
                // Specify the system user who is sending the message.
                service.CallerIdValue = new CallerId();
                service.CallerIdValue.CallerGuid = user.UserId; //new Guid("08a3c4ce-98a7-dc11-be35-0018f80b1359"); //user.UserId;
 
                #region  Create and  SendEmail request.
                SendEmailRequest req = new SendEmailRequest();
                req.EmailId = emailID;
                req.TrackingToken = "";
                req.IssueSend = true;
 
                // Send the email message.
                SendEmailResponse res = (SendEmailResponse)service.Execute(req);
                #endregion
 
 
                #region check success
 
                if (!res.Subject.Equals(""))
                    success = true;
 
                #endregion
 
                #region Remove Data Required for this email
 
                //Delete the email message.
                service.Delete(EntityName.email.ToString(), emailID);
 
                #endregion
 
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return success;
           
        }

                                              

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