HashSet(Of T).Clear Method ()
.NET Framework (current version)
Removes all elements from a HashSet(Of T) object.
Assembly: System.Core (in System.Core.dll)
Count is set to zero and references to other objects from elements of the collection are also released. The capacity remains unchanged until a call to TrimExcess is made.
This method is an O(n) operation, where n is Count.
The following example creates and populates a HashSet(Of T) collection, then clears it and releases the memory referenced by the collection.
Shared Sub Main() Dim Numbers As HashSet(Of Integer) = New HashSet(Of Integer)() For i As Integer = 0 To 9 Numbers.Add(i) Next i Console.Write("Numbers contains {0} elements: ", Numbers.Count) DisplaySet(Numbers) Numbers.Clear() Numbers.TrimExcess() Console.Write("Numbers contains {0} elements: ", Numbers.Count) DisplaySet(Numbers) End Sub ' This code example produces output similar to the following: ' Numbers contains 10 elements: { 0 1 2 3 4 5 6 7 8 9 } ' Numbers contains 0 elements: { }
Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 4.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 4.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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