NotAfter Property

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Gets the date in local time after which a certificate is no longer valid.

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

public DateTime NotAfter { get; }

Property Value

Type: System..::..DateTime
A DateTime object that represents the expiration date for the certificate .


The certificate is unreadable.

This property indicates an expiration date on which the certificate becomes invalid.