X509Certificate Constructor (String, String, X509KeyStorageFlags)


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Initializes a new instance of the X509Certificate class using the name of a PKCS7 signed file, a password to access the certificate, and a key storage flag.

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

public X509Certificate(
	string fileName,
	string password,
	X509KeyStorageFlags keyStorageFlags


Type: System.String

The name of a PKCS7 signed file.

Type: System.String

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

Type: System.Security.Cryptography.X509Certificates.X509KeyStorageFlags

A bitwise combination of the enumeration values that control where and how to import the certificate.

Exception Condition

An error with the certificate occurs. For example:

  • The certificate file does not exist.

  • The certificate is invalid.

  • The certificate's password is incorrect.


The fileName parameter is null.

If you create an X509Certificate certificate by specifying a PKCS7 signed file store for fileName, the X509Certificate is created for the certificate that signed the store rather than for any of the certificates within the store.


for permission to read the file described by the fileName parameter. Security action: Demand. Associated enumeration: EnvironmentPermissionAccess.Read


for permission to create a key container. Security action: Demand. Associated enumeration: KeyContainerPermissionFlags.Create

.NET Framework
Available since 2.0
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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