	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 BaseMultiset.IsEmpty.)
	Item	Gets the Set with the given ID. (Overrides BaseMultiset.Item[Int32].)
	SetIDs	Returns an empty enumerable as the Null Multiset contains no Sets. (Overrides BaseMultiset.SetIDs.)
	Sets	Returns an empty enumerable as the Null Multiset contains no Sets. (Overrides BaseMultiset.Sets.)
	Variables	Returns an empty enumerable as the Null Multiset contains no Variables. (Overrides BaseMultiset.Variables.)
	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 BaseMultiset.Add(ISet).)
	AddVariable	Adds a Variable to this Multiset. (Overrides BaseMultiset.AddVariable(String).)
	ContainsValue	Returns false since the Null Multiset contains no values. (Overrides BaseMultiset.ContainsValue(String, INode).)
	ContainsVariable	Returns false since the Null Multiset contains no variables. (Overrides BaseMultiset.ContainsVariable(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 BaseMultiset.ExistsJoin(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 BaseMultiset.IsDisjointWith(BaseMultiset).)
	Join	Joins another Multiset to this Null Mutliset. (Overrides BaseMultiset.Join(BaseMultiset).)
	LeftJoin	Left Joins another Multiset to this Null Mutliset. (Overrides BaseMultiset.LeftJoin(BaseMultiset, ISparqlExpression).)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	MinusJoin	Minus Joins this Multiset to another Multiset. (Overrides BaseMultiset.MinusJoin(BaseMultiset).)
	Product	Computes the Product of this Multiset and another Multiset. (Overrides BaseMultiset.Product(BaseMultiset).)
	Remove	Removes a Set from a Multiset. (Overrides BaseMultiset.Remove(Int32).)
	SetVariableOrder	Sets the variable ordering for the multiset. (Overrides BaseMultiset.SetVariableOrder(IEnumerable<String>).)
	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 BaseMultiset.Union(BaseMultiset).)

NullMultiset Class

Reference