HashSet<T>.ExceptWith Method
.NET Framework 4.5
Removes all elements in the specified collection from the current HashSet<T> object.
Namespace: System.Collections.Generic
Assembly: System.Core (in System.Core.dll)
Parameters
- other
- Type: System.Collections.Generic.IEnumerable<T>
The collection of items to remove from the HashSet<T> object.
Implements
ISet<T>.ExceptWith(IEnumerable<T>)| Exception | Condition |
|---|---|
| ArgumentNullException | other is null. |
The following example creates two HashSet<T> collections with overlapping sets of data. The lower range of values is then removed from the larger set using the ExceptWith method.
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 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
