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Gets the "color depth" field in the additional information dialog.
This value is part of the signature details metadata shown in the additional information dialog for a digital signature.
int ColorDepth { get; }
ReadOnly Property ColorDepth As Integer
workbook.Open(GetSignedWorkbookStream());
ISignature signature = workbook.Signatures[0];
IReadOnlySignatureDetails details = signature.Details;
int colorDepth = details.ColorDepth;