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X509Certificate.GetSerialNumberString Method

Returns the serial number of the X.509v3 certificate as a hexadecimal string.

Namespace:  System.Security.Cryptography.X509Certificates
Assembly:  mscorlib (in mscorlib.dll)

'Declaration
Public Overridable Function GetSerialNumberString As String

Return Value

Type: System.String
The serial number of the X.509 certificate as a hexadecimal string.

The following example uses the GetSerialNumberString method to return a certificate's serial number as a string and displays it to the console.

Imports System
Imports System.Security.Cryptography.X509Certificates




Public Class X509


   Public Shared Sub Main()

      ' The path to the certificate. 
      Dim Certificate As String = "Certificate.cer" 

      ' Load the certificate into an X509Certificate object. 
      Dim cert As X509Certificate = X509Certificate.CreateFromCertFile(Certificate)

      ' Get the value. 
      Dim results As String = cert.GetSerialNumberString()

      ' Display the value to the console.
      Console.WriteLine(results)
   End Sub  
End Class

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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