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Dictionary(Of TKey, TValue).IDictionary.Values Property

Gets an ICollection containing the values in the IDictionary.

Namespace:  System.Collections.Generic
Assemblies:   mscorlib (in mscorlib.dll)
  System.Collections (in System.Collections.dll)

'Declaration
Private ReadOnly Property Values As ICollection 
	Implements IDictionary.Values

Property Value

Type: System.Collections.ICollection
An ICollection containing the values in the IDictionary.

Implements

IDictionary.Values

The order of the values in the returned ICollection is unspecified, but it is guaranteed to be the same order as the corresponding keys in the ICollection returned by the Keys property.

Getting the value of this property is an O(1) operation.

The following code example shows how to use the IDictionary.Values property of the System.Collections.IDictionary interface with a Dictionary(Of TKey, TValue), to list the values in the dictionary. The example also shows how to enumerate the key/value pairs in the dictionary; note that the enumerator for the System.Collections.IDictionary interface returns DictionaryEntry objects rather than KeyValuePair(Of TKey, TValue) objects.

The code example is part of a larger example, including output, provided for the IDictionary.Add method.

Imports System
Imports System.Collections
Imports System.Collections.Generic

Public Class Example

    Public Shared Sub Main() 

        ' Create a new dictionary of strings, with string keys, 
        ' and access it using the IDictionary interface. 
        
        Dim openWith As IDictionary = _
            New Dictionary(Of String, String)

        ' Add some elements to the dictionary. There are no  
        ' duplicate keys, but some of the values are duplicates. 
        ' IDictionary.Add throws an exception if incorrect types 
        ' are supplied for key or value.
        openWith.Add("txt", "notepad.exe")
        openWith.Add("bmp", "paint.exe")
        openWith.Add("dib", "paint.exe")
        openWith.Add("rtf", "wordpad.exe")


...


' To get the values alone, use the Values property. 
Dim icoll As ICollection = openWith.Values

' The elements of the collection are strongly typed 
' with the type that was specified for dictionary values, 
' even though the ICollection interface is not strongly 
' typed.
Console.WriteLine()
For Each s As String In  icoll
    Console.WriteLine("Value = {0}", s)
Next s


...


' When you use foreach to enumerate dictionary elements 
' with the IDictionary interface, the elements are retrieved 
' as DictionaryEntry objects instead of KeyValuePair objects.
Console.WriteLine()
For Each de As DictionaryEntry In openWith
    Console.WriteLine("Key = {0}, Value = {1}", _
        de.Key, de.Value)
Next 


...



    End Sub 

End Class

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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