Keys Property
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IDictionary.Keys Property

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Gets an ICollection object containing the keys of the IDictionary object.

Namespace:  System.Collections
Assembly:  mscorlib (in mscorlib.dll)

'Declaration
ReadOnly Property Keys As ICollection

Property Value

Type: System.Collections.ICollection
An ICollection object containing the keys of the IDictionary object.

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

The following code example demonstrates how to implement the Keys property. This code example is part of a larger example provided for the IDictionary class.


Public ReadOnly Property Keys() As ICollection Implements IDictionary.Keys
   Get

      ' Return an array where each item is a key.
      ' Note: Declaring keyArray() to have a size of ItemsInUse - 1
      '       ensures that the array is properly sized, in VB.NET
      '       declaring an array of size N creates an array with
      '       0 through N elements, including N, as opposed to N - 1
      '       which is the default behavior in C# and C++.
      Dim keyArray() As Object = New Object(ItemsInUse - 1) {}
      Dim n As Integer
      For n = 0 To ItemsInUse - 1
         keyArray(n) = items(n).Key
      Next n

      Return keyArray
   End Get
End Property


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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