X509Certificate.Export Method (X509ContentType, String)

Note: This method is new in the .NET Framework version 2.0.

Exports the current X509Certificate object to a byte array in a format described by one of the X509ContentType values, and using the specified password.

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

public virtual byte[] Export (
	X509ContentType contentType,
	string password
/** @attribute ComVisibleAttribute(false) */ 
public byte[] Export (
	X509ContentType contentType, 
	String password
public function Export (
	contentType : X509ContentType, 
	password : String
) : byte[]



One of the X509ContentType values that describes how to format the output data.


The password required to access the X.509 certificate data.

Return Value

An array of bytes that represents the current X509Certificate object.

Exception typeCondition


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 MSIL Disassembler (Ildasm.exe), a hex editor, or by simply opening the assembly in a text editor such as Notepad.exe.

  • KeyContainerPermission  for permission to open a key container and export a certificate when you pass the SerializedCert value to the contentType parameter. Associated enumerations: Open and Export Security action: Demand

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0