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X509SecurityToken.ValidFrom Property

Gets the first instant in time at which this security token is valid.

Namespace:  System.IdentityModel.Tokens
Assembly:  System.IdentityModel (in System.IdentityModel.dll)

public override DateTime ValidFrom { get; }

Property Value

Type: System.DateTime
A DateTime that represents the instant in time at which this security token is first valid.

The ValidFrom property is specified in Coordinated Universal Time (UTC) and is the value of the NotBefore property of the X.509 certificate specified in the Certificate property.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, 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.

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