DigitalSignatureSignTime Property

public DateTime SignTime { get; }

Public ReadOnly Property SignTime As DateTime
	Get

public:
virtual property DateTime SignTime {
	DateTime get () sealed;
}

abstract SignTime : DateTime with get
override SignTime : DateTime with get

[C#]
using (Presentation pres = new Presentation("SomePresentationSigned.pptx"))
{
    foreach (DigitalSignature signature in pres.DigitalSignatures)
        Console.WriteLine("Signature check: " + (signature.IsValid ? "VALID" : "INVALID") + ", Signing time: " + signature.SignTime);
}