The grade points corresponding to an incorrect answer for an OmrField.
[DataMemberAttribute()]
public double IncorrectGrade { get; set; }
IncorrectGrade specifies the deduction value in points of an incorrect answer for the question corresponding to an OmrField. The default value is 0.
If the OmrField is gradable, this value is used to grade the internal OmrCollections. In case the user needs to set different scores for different questions in the OmrField, the value can be set individually for every OmrCollection.