Returns

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Remarks

The returned DateTime is local date/time.

Fx 1.x has a bug where the local time returned is *always* in the Seattle time zone. This is fixed in Fx 2.0.

The method return null if the certificate was created from an Authenticode(r) signature. This can be the case for certificates created using System.Security.Cryptography.X509Certificates.X509Certificate.CreateFromSignedFile. The timestamp associated with the signature is the guarantee that the certificate was valid at the time of signing (hence it's validity period being hidden).

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Requirements

Namespace: System.Security.Cryptography.X509Certificates
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0