	Name	Description
	Count	Gets the Count of Sets in the Multiset. (Inherited from BaseMultiset.)
	IsEmpty	Returns true since the Null Multiset is always empty. (Overrides BaseMultisetIsEmpty.)
	Item	Gets the Set with the given ID. (Overrides BaseMultisetItemInt32.)
	SetIDs	Returns an empty enumerable as the Null Multiset contains no Sets. (Overrides BaseMultisetSetIDs.)
	Sets	Returns an empty enumerable as the Null Multiset contains no Sets. (Overrides BaseMultisetSets.)
	Variables	Returns an empty enumerable as the Null Multiset contains no Variables. (Overrides BaseMultisetVariables.)
	VirtualCount	The number of results that would be returned without any limit clause to a query or -1 if not supported. Defaults to the same value as the Count member. (Inherited from BaseMultiset.)

	Name	Description
	Add	Adds a Set to this Multiset. (Overrides BaseMultisetAdd(ISet).)
	AddVariable	Adds a Variable to this Multiset. (Overrides BaseMultisetAddVariable(String).)
	ContainsValue	Returns false since the Null Multiset contains no values. (Overrides BaseMultisetContainsValue(String, INode).)
	ContainsVariable	Returns false since the Null Multiset contains no variables. (Overrides BaseMultisetContainsVariable(String).)
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	ExistsJoin	Exists Joins another Multiset to this Null Mutliset. (Overrides BaseMultisetExistsJoin(BaseMultiset, Boolean).)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	IsDisjointWith	Returns true since the Null Multiset is disjoint with all Multisets. (Overrides BaseMultisetIsDisjointWith(BaseMultiset).)
	Join	Joins another Multiset to this Null Mutliset. (Overrides BaseMultisetJoin(BaseMultiset).)
	LeftJoin	Left Joins another Multiset to this Null Mutliset. (Overrides BaseMultisetLeftJoin(BaseMultiset, ISparqlExpression).)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	MinusJoin	Minus Joins this Multiset to another Multiset. (Overrides BaseMultisetMinusJoin(BaseMultiset).)
	Product	Computes the Product of this Multiset and another Multiset. (Overrides BaseMultisetProduct(BaseMultiset).)
	Remove	Removes a Set from a Multiset. (Overrides BaseMultisetRemove(Int32).)
	SetVariableOrder	Sets the variable ordering for the multiset. (Overrides BaseMultisetSetVariableOrder(IEnumerableString).)
	Sort	Sorts a Set based on the given Comparer. (Inherited from BaseMultiset.)
	ToString	Gets the string representation of the multiset (intended for debugging only). (Inherited from BaseMultiset.)
	Trim	Trims the Multiset of Temporary Variables. (Inherited from BaseMultiset.)
	Trim(String)	Trims the Multiset by removing all Values for the given Variable. (Inherited from BaseMultiset.)
	Union	Unions this Multiset with another Multiset. (Overrides BaseMultisetUnion(BaseMultiset).)

NullMultiset Class

Reference