Removes all elements in the specified collection from the current HashSet<(Of <(T>)>) object.
Public Sub ExceptWith ( _ other As IEnumerable(Of T) _ )
Dim instance As HashSet Dim other As IEnumerable(Of T) instance.ExceptWith(other)
public void ExceptWith( IEnumerable<T> other )
public: void ExceptWith( IEnumerable<T>^ other )
public function ExceptWith( other : IEnumerable<T> )
other is nullNothingnullptra null reference (Nothing in Visual Basic).
The ExceptWith method is the equivalent of mathematical set subtraction.
This method is an O(n) operation, where n is the number of elements in the other parameter.
The following example creates two HashSet<(Of <(T>)>) collections with overlapping sets of data. The lower range of values is then removed from the larger set using the ExceptWith method.
Shared Sub Main() Dim lowNumbers As HashSet(Of Integer) = New HashSet(Of Integer)() Dim highNumbers As HashSet(Of Integer) = New HashSet(Of Integer)() For i As Integer = 0 To 5 lowNumbers.Add(i) Next i For i As Integer = 3 To 9 highNumbers.Add(i) Next i Console.Write("lowNumbers contains {0} elements: ", lowNumbers.Count) DisplaySet(lowNumbers) Console.Write("highNumbers contains {0} elements: ", highNumbers.Count) DisplaySet(highNumbers) Console.WriteLine("highNumbers ExceptWith lowNumbers...") highNumbers.ExceptWith(lowNumbers) Console.Write("highNumbers contains {0} elements: ", highNumbers.Count) DisplaySet(highNumbers) End Sub ' This example provides output similar to the following: ' lowNumbers contains 6 elements: { 0 1 2 3 4 5 } ' highNumbers contains 7 elements: { 3 4 5 6 7 8 9 } ' highNumbers ExceptWith lowNumbers... ' highNumbers contains 4 elements: { 6 7 8 9 }
static void Main() { HashSet<int> lowNumbers = new HashSet<int>(); HashSet<int> highNumbers = new HashSet<int>(); for (int i = 0; i < 6; i++) { lowNumbers.Add(i); } for (int i = 3; i < 10; i++) { highNumbers.Add(i); } Console.Write("lowNumbers contains {0} elements: ", lowNumbers.Count); DisplaySet(lowNumbers); Console.Write("highNumbers contains {0} elements: ", highNumbers.Count); DisplaySet(highNumbers); Console.WriteLine("highNumbers ExceptWith lowNumbers..."); highNumbers.ExceptWith(lowNumbers); Console.Write("highNumbers contains {0} elements: ", highNumbers.Count); DisplaySet(highNumbers); } /* This example provides output similar to the following: * lowNumbers contains 6 elements: { 0 1 2 3 4 5 } * highNumbers contains 7 elements: { 3 4 5 6 7 8 9 } * highNumbers ExceptWith lowNumbers... * highNumbers contains 4 elements: { 6 7 8 9 } */
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003