How do you deserialized a serialized object?

I'm trying to extract the serials of fingerprint template which will be stored to the database. Here is my code:

Code:
Dim features As DPFP.FeatureSet = ExtractFeatures(Sample, DPFP.Processing.DataPurpose.Enrollment) <--- Serialized Object
And here is my sad failure attemp:

Code:
SetText(String.Format("Stat: {0}", features.DeSerialize(WHAT SHOULD I PUT IN HERE????)))
I hope you could help me guys.