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X509Certificate.Export Method (X509ContentType, SecureString)

Exports the current X509Certificate object to a byte array using the specified format and a password.

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

abstract Export : 
        contentType:X509ContentType * 
        password:SecureString -> byte[] 
override Export : 
        contentType:X509ContentType * 
        password:SecureString -> byte[] 


Type: System.Security.Cryptography.X509Certificates.X509ContentType
One of the X509ContentType values that describes how to format the output data.
Type: System.Security.SecureString
The password required to access the X.509 certificate data.

Return Value

Type: System.Byte[]
A byte array that represents the current X509Certificate object.


A value other than Cert, SerializedCert, or Pkcs12 was passed to the contentType parameter.


The certificate could not be exported.

The contentType parameter accepts only the following values of the X509ContentType enumeration: Cert, SerializedCert, and Pkcs12. Passing any other value causes a CryptographicException to be thrown.

Security noteSecurity Note

Never hard code a password within your source code. Hard-coded passwords can be retrieved from an assembly using the Ildasm.exe (MSIL Disassembler), a hex editor, or by simply opening the assembly in a text editor such as Notepad.exe.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.