| ContactChangeData Properties | 
The ContactChangeData type exposes the following members.
| Name | Description | |
|---|---|---|
| ChangedColumns | 
            List of columns which have changed. Is null when ContactIsNew is true.
              | |
| ContactID | 
            Contact ID.
              | |
| ContactIsNew | 
            If true the change represents a new contact creation. ChangedColumns are not included if contact is new.
              | |
| ContactWasMerged | 
            Gets or sets the value indicating if the contact was automatically merged.
              |