An optional insert, update or delete URI parameter that allows the caller to specify that it is a sync adapter. The default value is false. If set to true, the modified row is not marked as "dirty" (needs to be synced) and when the provider calls Android.Content.ContentResolver.NotifyChange(Android.Net.Uri, Android.Database.ContentObserver, Android.Database.ContentObserver) , the third parameter "syncToNetwork" is set to false. Furthermore, if set to true, the caller must also include NoType:android/provider/CalendarContract$SyncColumns;Href=../../../reference/android/provider/CalendarContract.SyncColumns.html#ACCOUNT_NAME and NoType:android/provider/CalendarContract$SyncColumns;Href=../../../reference/android/provider/CalendarContract.SyncColumns.html#ACCOUNT_TYPE as query parameters.