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X509Certificate2 Class

Represents an X.509 certificate.

System.Object
  System.Security.Cryptography.X509Certificates.X509Certificate
    System.Security.Cryptography.X509Certificates.X509Certificate2

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

[<SerializableAttribute>]
type X509Certificate2 =  
    class 
        inherit X509Certificate 
    end

The X509Certificate2 type exposes the following members.

  NameDescription
Public methodX509Certificate2()Initializes a new instance of the X509Certificate2 class.
Public methodX509Certificate2(Byte[])Initializes a new instance of the X509Certificate2 class using information from a byte array.
Public methodX509Certificate2(IntPtr)Initializes a new instance of the X509Certificate2 class using an unmanaged handle.
Public methodX509Certificate2(String)Initializes a new instance of the X509Certificate2 class using a certificate file name.
Public methodX509Certificate2(X509Certificate)Initializes a new instance of the X509Certificate2 class using an X509Certificate object.
Public methodX509Certificate2(Byte[], SecureString)Initializes a new instance of the X509Certificate2 class using a byte array and a password.
Public methodX509Certificate2(Byte[], String)Initializes a new instance of the X509Certificate2 class using a byte array and a password.
Protected methodX509Certificate2(SerializationInfo, StreamingContext)Initializes a new instance of the X509Certificate2 class using the specified serialization and stream context information.
Public methodX509Certificate2(String, SecureString)Initializes a new instance of the X509Certificate2 class using a certificate file name and a password.
Public methodX509Certificate2(String, String)Initializes a new instance of the X509Certificate2 class using a certificate file name and a password used to access the certificate.
Public methodX509Certificate2(Byte[], SecureString, X509KeyStorageFlags)Initializes a new instance of the X509Certificate2 class using a byte array, a password, and a key storage flag.
Public methodX509Certificate2(Byte[], String, X509KeyStorageFlags)Initializes a new instance of the X509Certificate2 class using a byte array, a password, and a key storage flag.
Public methodX509Certificate2(String, SecureString, X509KeyStorageFlags)Initializes a new instance of the X509Certificate2 class using a certificate file name, a password, and a key storage flag.
Public methodX509Certificate2(String, String, X509KeyStorageFlags)Initializes a new instance of the X509Certificate2 class using a certificate file name, a password used to access the certificate, and a key storage flag.
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  NameDescription
Public propertyArchivedGets or sets a value indicating that an X.509 certificate is archived.
Public propertyExtensionsGets a collection of X509Extension objects.
Public propertyFriendlyNameGets or sets the associated alias for a certificate.
Public propertyHandleGets a handle to a Microsoft Cryptographic API certificate context described by an unmanaged PCCERT_CONTEXT structure. (Inherited from X509Certificate.)
Public propertyHasPrivateKeyGets a value that indicates whether an X509Certificate2 object contains a private key.
Public propertyIssuerGets the name of the certificate authority that issued the X.509v3 certificate. (Inherited from X509Certificate.)
Public propertyIssuerNameGets the distinguished name of the certificate issuer.
Public propertyNotAfterGets the date in local time after which a certificate is no longer valid.
Public propertyNotBeforeGets the date in local time on which a certificate becomes valid.
Public propertyPrivateKeyGets or sets the AsymmetricAlgorithm object that represents the private key associated with a certificate.
Public propertyPublicKeyGets a PublicKey object associated with a certificate.
Public propertyRawDataGets the raw data of a certificate.
Public propertySerialNumberGets the serial number of a certificate.
Public propertySignatureAlgorithmGets the algorithm used to create the signature of a certificate.
Public propertySubjectGets the subject distinguished name from the certificate. (Inherited from X509Certificate.)
Public propertySubjectNameGets the subject distinguished name from a certificate.
Public propertyThumbprintGets the thumbprint of a certificate.
Public propertyVersionGets the X.509 format version of a certificate.
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  NameDescription
Public methodDispose()Releases all resources used by the current X509Certificate object. (Inherited from X509Certificate.)
Protected methodDispose(Boolean)Releases all of the unmanaged resources used by this X509Certificate and optionally releases the managed resources. (Inherited from X509Certificate.)
Public methodEquals(Object)Compares two X509Certificate objects for equality. (Inherited from X509Certificate.)
Public methodEquals(X509Certificate)Compares two X509Certificate objects for equality. (Inherited from X509Certificate.)
Public methodExport(X509ContentType)Exports the current X509Certificate object to a byte array in a format described by one of the X509ContentType values. (Inherited from X509Certificate.)
Public methodExport(X509ContentType, SecureString)Exports the current X509Certificate object to a byte array using the specified format and a password. (Inherited from X509Certificate.)
Public methodExport(X509ContentType, String)Exports the current X509Certificate object to a byte array in a format described by one of the X509ContentType values, and using the specified password. (Inherited from X509Certificate.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodStatic memberGetCertContentType(Byte[])Indicates the type of certificate contained in a byte array.
Public methodStatic memberGetCertContentType(String)Indicates the type of certificate contained in a file.
Public methodGetCertHashReturns the hash value for the X.509v3 certificate as an array of bytes. (Inherited from X509Certificate.)
Public methodGetCertHashStringReturns the SHA1 hash value for the X.509v3 certificate as a hexadecimal string. (Inherited from X509Certificate.)
Public methodGetEffectiveDateStringReturns the effective date of this X.509v3 certificate. (Inherited from X509Certificate.)
Public methodGetExpirationDateStringReturns the expiration date of this X.509v3 certificate. (Inherited from X509Certificate.)
Public methodGetFormatReturns the name of the format of this X.509v3 certificate. (Inherited from X509Certificate.)
Public methodGetHashCodeReturns the hash code for the X.509v3 certificate as an integer. (Inherited from X509Certificate.)
Public methodGetIssuerName Obsolete. Returns the name of the certification authority that issued the X.509v3 certificate. (Inherited from X509Certificate.)
Public methodGetKeyAlgorithmReturns the key algorithm information for this X.509v3 certificate as a string. (Inherited from X509Certificate.)
Public methodGetKeyAlgorithmParametersReturns the key algorithm parameters for the X.509v3 certificate as an array of bytes. (Inherited from X509Certificate.)
Public methodGetKeyAlgorithmParametersStringReturns the key algorithm parameters for the X.509v3 certificate as a hexadecimal string. (Inherited from X509Certificate.)
Public methodGetName Obsolete. Returns the name of the principal to which the certificate was issued. (Inherited from X509Certificate.)
Public methodGetNameInfoGets the subject and issuer names from a certificate.
Public methodGetPublicKeyReturns the public key for the X.509v3 certificate as an array of bytes. (Inherited from X509Certificate.)
Public methodGetPublicKeyStringReturns the public key for the X.509v3 certificate as a hexadecimal string. (Inherited from X509Certificate.)
Public methodGetRawCertDataReturns the raw data for the entire X.509v3 certificate as an array of bytes. (Inherited from X509Certificate.)
Public methodGetRawCertDataStringReturns the raw data for the entire X.509v3 certificate as a hexadecimal string. (Inherited from X509Certificate.)
Public methodGetSerialNumberReturns the serial number of the X.509v3 certificate as an array of bytes. (Inherited from X509Certificate.)
Public methodGetSerialNumberStringReturns the serial number of the X.509v3 certificate as a hexadecimal string. (Inherited from X509Certificate.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodImport(Byte[])Populates an X509Certificate2 object with data from a byte array. (Overrides X509Certificate.Import(Byte[]).)
Public methodImport(String)Populates an X509Certificate2 object with information from a certificate file. (Overrides X509Certificate.Import(String).)
Public methodImport(Byte[], SecureString, X509KeyStorageFlags)Populates an X509Certificate2 object using data from a byte array, a password, and a key storage flag. (Overrides X509Certificate.Import(Byte[], SecureString, X509KeyStorageFlags).)
Public methodImport(Byte[], String, X509KeyStorageFlags)Populates an X509Certificate2 object using data from a byte array, a password, and flags for determining how to import the private key. (Overrides X509Certificate.Import(Byte[], String, X509KeyStorageFlags).)
Public methodImport(String, SecureString, X509KeyStorageFlags)Populates an X509Certificate2 object with information from a certificate file, a password, and a key storage flag. (Overrides X509Certificate.Import(String, SecureString, X509KeyStorageFlags).)
Public methodImport(String, String, X509KeyStorageFlags)Populates an X509Certificate2 object with information from a certificate file, a password, and a X509KeyStorageFlags value. (Overrides X509Certificate.Import(String, String, X509KeyStorageFlags).)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodResetResets the state of an X509Certificate2 object. (Overrides X509Certificate.Reset().)
Public methodToString()Displays an X.509 certificate in text format. (Overrides X509Certificate.ToString().)
Public methodToString(Boolean)Displays an X.509 certificate in text format. (Overrides X509Certificate.ToString(Boolean).)
Public methodVerifyPerforms a X.509 chain validation using basic validation policy.
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  NameDescription
Public Extension MethodGetCngPrivateKeyReturns a CngKey object that represents the private key of an X.509 certificate that has its private key stored with NCrypt rather than with CAPI. [This documentation is preliminary and is subject to change in the next release of the .NET Framework 4.6.]
(Defined by X509CertificateExtensions.)
Public Extension MethodGetCngPublicKeyReturns a CngKey object that represents the public key of an X.509 certificate. [This documentation is preliminary and is subject to change in the next release of the .NET Framework 4.6.]
(Defined by X509CertificateExtensions.)
Public Extension MethodHasCngKeyIndicates whether the X509Certificate references a key stored with NCrypt in CNG. [This documentation is preliminary and is subject to change in the next release of the .NET Framework 4.6.]
(Defined by X509CertificateExtensions.)
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  NameDescription
Explicit interface implemetationPrivate methodIDeserializationCallback.OnDeserializationImplements the ISerializable interface and is called back by the deserialization event when deserialization is complete. (Inherited from X509Certificate.)
Explicit interface implemetationPrivate methodISerializable.GetObjectDataGets serialization information with all the data needed to recreate an instance of the current X509Certificate object. (Inherited from X509Certificate.)
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The X.509 structure originated in the International Organization for Standardization (ISO) working groups. This structure can be used to represent various types of information including identity, entitlement, and holder attributes (permissions, age, sex, location, affiliation, and so forth). Although the ISO specifications are most informative on the structure itself, the X509Certificate2 class is designed to model the usage scenarios defined in specifications issued by the Internet Engineering Task Force (IETF) Public Key Infrastructure, X.509 (PKIX) working group. The most informative of these specifications is RFC 3280, "Certificate and Certificate Revocation List (CRL) Profile."

The following example demonstrates how to use an X509Certificate2 object to encrypt and decrypt a file.

No code example is currently available or this language may not be supported.

The following example creates a command-line executable that takes a certificate file as an argument and prints various certificate properties to the console.

No code example is currently available or this language may not be supported.

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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