Namespace:
System.Collections.Generic
Assembly:
System.Core (in System.Core.dll)
Visual Basic (Declaration)
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>
)
| Exception | Condition |
|---|
| ArgumentNullException |
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
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5
Reference