HashSet(T).Contains Method tells whether a HashSet(Of T) object contains the specified element. : HashSet « Data Structure « VB.Net

1. VB.Net
2. Data Structure
3. HashSet

HashSet(T).Contains Method tells whether a HashSet(Of T) object contains the specified element.

 

Imports System
Imports System.Collections.Generic

Class Program
    Shared Sub Main()
    
        Dim evenNumbers As HashSet(Of Integer) = New HashSet(Of Integer)()
    
        For i As Integer = 0 To 19
            evenNumbers.Add(i)
        Next i
    
        Console.Write("evenNumbers contains {0} elements: ", evenNumbers.Count)
    
        evenNumbers.RemoveWhere(AddressOf isEven)
    
        Console.Write("evenNumbers contains {0} elements: ", evenNumbers.Count)
    
        If evenNumbers.Contains(0) Then
            evenNumbers.Remove(0)
        End If
    
        Console.Write("evenNumbers contains {0} elements: ", evenNumbers.Count)
    End Sub
    
    Private Shared Function isEven(ByVal i As Integer) As Boolean
        Return ((i Mod 2) = 1)
    End Function
End Class  

   
  

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