Wintellect.PowerCollections Namespace
Algorithms Class
Algorithms Methods
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Algorithms..::..IsSubsetOf<(Of <(<'T>)>)> Method (IEnumerable<(Of <(<'T>)>)>, IEnumerable<(Of <(<'T>)>)>)

Determines if one collection is a subset of another, considered as sets. The first set is a subset of the second set if every item in the first set also occurs in the second set. If an item appears X times in the first set, it must appear at least X times in the second set.

Namespace:  Wintellect.PowerCollections
Assembly:  PowerCollections (in PowerCollections.dll)

Syntax


public static bool IsSubsetOf<T>(
	IEnumerable<T> collection1,
	IEnumerable<T> collection2
)
Public Shared Function IsSubsetOf(Of T) ( _
	collection1 As IEnumerable(Of T), _
	collection2 As IEnumerable(Of T) _
) As Boolean
public:
generic<typename T>
static bool^ IsSubsetOf(
	IEnumerable<T>^ collection1, 
	IEnumerable<T>^ collection2
)

Type Parameters

T

Parameters

collection1
Type: IEnumerable<(Of <(<'T>)>)>
The first collection.
collection2
Type: IEnumerable<(Of <(<'T>)>)>
The second collection.

Return Value

True if collection1 is a subset of collection2, considered as sets.

Exceptions


ExceptionCondition
ArgumentNullExceptioncollection1 or collection2 is null.

Remarks


The default sense of equality for T is used, as defined by T's implementation of IComparable<T>.Equals or object.Equals.

If both collections are Set, Bag, OrderedSet, or OrderedBag collections, it is more efficient to use the IsSubsetOf method on that class.