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Encoding.Equals Method

Determines whether the specified Object is equal to the current instance.

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

'Declaration
Public Overrides Function Equals ( _
	value As Object _
) As Boolean

Parameters

value
Type: System.Object

The Object to compare with the current instance.

Return Value

Type: System.Boolean
true if value is an instance of Encoding and is equal to the current instance; otherwise, false.

Two instances of Encoding are considered equal if they correspond to the same code page and their EncoderFallback and DecoderFallback objects are equal. In particular, derived code pages all have a code page of 0 and their fallbacks are normally null (Nothing in Visual Basic .NET). Thus they are all considered equal to one another. One consequence is that when Equals is used to populate a hash table, all derived encodings compare equal and fall into the same hash table slot.

The following example gets two instances of the same encoding (one by codepage and another by name), and checks their equality.

Imports System
Imports System.Text

Public Class SamplesEncoding   

   Public Shared Sub Main()

      ' Get a UTF-32 encoding by codepage. 
      Dim e1 As Encoding = Encoding.GetEncoding(12000)

      ' Get a UTF-32 encoding by name. 
      Dim e2 As Encoding = Encoding.GetEncoding("utf-32")

      ' Check their equality.
      Console.WriteLine("e1 equals e2? {0}", e1.Equals(e2))

   End Sub 'Main 

End Class 'SamplesEncoding


'This code produces the following output. 

'e1 equals e2? True

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

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

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, 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.

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