# SymmetricAlgorithm.LegalBlockSizes Propriété

## Définition

Obtient les tailles de bloc, en octets, prises en charge par l'algorithme symétrique.

``````public:
virtual property cli::array <System::Security::Cryptography::KeySizes ^> ^ LegalBlockSizes { cli::array <System::Security::Cryptography::KeySizes ^> ^ get(); };``````
``public virtual System.Security.Cryptography.KeySizes[] LegalBlockSizes { get; }``
``member this.LegalBlockSizes : System.Security.Cryptography.KeySizes[]``
``Public Overridable ReadOnly Property LegalBlockSizes As KeySizes()``

#### Valeur de propriété

KeySizes[]

Tableau qui contient les tailles de bloc prises en charge par l'algorithme.

## Exemples

L’exemple suivant illustre la valeur de LegalBlockSizes pour les algorithmes symétriques.

``````using System;
using System.Security.Cryptography;
namespace SymmetricAlgo
{
class Program
{
static void Main(string[] args)
{
Aes aes = Aes.Create();
Console.WriteLine("Aes ");
KeySizes[] ks = aes.LegalKeySizes;
foreach (KeySizes k in ks)
{
Console.WriteLine("\tLegal min key size = " + k.MinSize);
Console.WriteLine("\tLegal max key size = " + k.MaxSize);
}
ks = aes.LegalBlockSizes;
foreach (KeySizes k in ks)
{
Console.WriteLine("\tLegal min block size = " + k.MinSize);
Console.WriteLine("\tLegal max block size = " + k.MaxSize);
}
}
}
}
//This sample produces the following output:
//Aes
//        Legal min key size = 128
//        Legal max key size = 256
//        Legal min block size = 128
//        Legal max block size = 128
``````
``````Imports System.Security.Cryptography

Class Program

Shared Sub Main(ByVal args() As String)
Dim aes As Aes = Aes.Create()
Console.WriteLine("Aes ")
Dim ks As KeySizes() = aes.LegalKeySizes
Dim k As KeySizes
For Each k In ks
Console.WriteLine(vbTab + "Legal min key size = " & k.MinSize)
Console.WriteLine(vbTab + "Legal max key size = " & k.MaxSize)
Next k
ks = aes.LegalBlockSizes

For Each k In ks
Console.WriteLine(vbTab + "Legal min block size = " & k.MinSize)
Console.WriteLine(vbTab + "Legal max block size = " & k.MaxSize)
Next k

End Sub
End Class
'This sample produces the following output:
'Aes
'        Legal min key size = 128
'        Legal max key size = 256
'        Legal min block size = 128
'        Legal max block size = 128
``````

## Remarques

L’algorithme symétrique prend en charge uniquement les tailles de bloc qui correspondent à une entrée dans ce tableau.