crm2011 获取实体的ObjectTypeCode

public static int GetObjectTypeCode(IOrganizationService service, string enName)
        {
            RetrieveEntityRequest request = new RetrieveEntityRequest() {
                LogicalName = enName
            };
            RetrieveEntityResponse response = (RetrieveEntityResponse)service.Execute(request);
            return response.EntityMetadata.ObjectTypeCode.Value;
        }