i have a question like is there any way i can send two records from my .net code using api to hubspot contacts with same emailaddress but different contact owner ?is there any way hubspot can check if contact owner is different still it will create record although emailaddress is same?
According to https://knowledge.hubspot.com/, if you import a contact that already exists with the same email, HubSpot adds new details to this record.
As an alternative, you can move data automatedly using the Help Desk Migration service. It includes data mapping and supports CSV import and export. You can try it for free, by the way.