MS Dynamics - Create and auto qualify a lead from API

 
                Entity lead = new Entity("lead");  
                lead[LeadAttributes.LeadSource] = new OptionSetValue(Convert.ToInt32(leadDetails.LeadSource));
                lead[LeadAttributes.FirstName] = leadDetails.FName;
                lead[LeadAttributes.LastName] = leadDetails.LName;
                lead[LeadAttributes.FullName] = leadDetails.FName + "" + leadDetails.LName;
                lead[LeadAttributes.Email] = leadDetails.Email;
                lead[LeadAttributes.Mobile] = leadDetails.Mobile;   
                lead[LeadAttributes.City] = leadDetails.City;
                lead[LeadAttributes.State] = new OptionSetValue(leadDetails.State);
                lead[LeadAttributes.Country] = leadDetails.Country;
                lead[LeadAttributes.ZipCode] = leadDetails.ZipCode;
                Guid _leadId = _service.Create(lead);  

//Auto qualify the Lead and create Account, contact and Opportunity
                    
                var qualifyIntoAccountContactReq = new QualifyLeadRequest();
                qualifyIntoAccountContactReq["CreateAccount"] = true;
                qualifyIntoAccountContactReq["CreateContact"] = true;
                qualifyIntoAccountContactReq["CreateOpportunity"] = true;
                qualifyIntoAccountContactReq["LeadId"] = new EntityReference("lead", _leadId);
                qualifyIntoAccountContactReq["Status"] = new OptionSetValue(3);
                var qualifyIntoAccountContactRes = (QualifyLeadResponse)_service.Execute(qualifyIntoAccountContactReq);
                foreach (var entity in qualifyIntoAccountContactRes.CreatedEntities)
                {
                    if (entity.LogicalName == "account")
                    {
                        _leadAccountId = entity.Id;
                    }
                    else if (entity.LogicalName == "contact")
                    {
                        _contactId = entity.Id;
                    }
                    else if (entity.LogicalName == "opportunity")
                    {
                        _opportunityId = entity.Id;
                    }
                }