MQL5 ReferenceStandard LibraryGeneric Data CollectionsCHashSet<T>Count AddCountContainsComparerTrimExcessCopyToClearRemoveExceptWithIntersectWithSymmetricExceptWithUnionWithIsProperSubsetOfIsProperSupersetOfIsSubsetOfIsSupersetOfOverlapsSetEquals Count Returns the number of elements in a set. int Count(); Return Value Returns the number of elements. Add Contains