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X509Certificate2.PublicKey Property

.NET Framework 4.5

Gets a PublicKey object associated with a certificate.

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

member PublicKey : PublicKey with get

Property Value

Type: System.Security.Cryptography.X509Certificates.PublicKey
A PublicKey object.

Exceptions

Exception	Condition
CryptographicException	The key value is not an RSA or DSA key, or the key is unreadable.

Remarks

This property returns a PublicKey object, which contains the object identifier (Oid) representing the public key algorithm, the ASN.1-encoded parameters, and the ASN.1-encoded key value.

You can also obtain the key as an AsymmetricAlgorithm object by referencing the PublicKey property. This property supports only RSA or DSA keys, so it returns either an RSACryptoServiceProvider or a DSACryptoServiceProvider object that represents the public key.

Examples

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

C++

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

Version Information

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

Reference

X509Certificate2 Class

System.Security.Cryptography.X509Certificates Namespace

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