/// <summary>
/// Contact Person Get
/// </summary>
public async Task <IEnumerable <ContactPersonDto> > ContactPersonGet(string contactPersonGuid, string contactGuid, string serviceGroupGuid)
{
var persons = await ContactInfo.ContactPersonGet(contactPersonGuid, contactGuid, serviceGroupGuid);
var result = persons.Select(c =>
JsonDataExtensions.JsonToEntityData <ContactPersonDto>(c.contact_person_info));
return(result);
}