We are trying to get the URI string from a Link annotation, but the text is not what we see in Acrobat.
string target = action.GetSDFObj().Get("URI").Value().GetAsPDFText();
How do we get the correct text.
Link URI are one of the very few places in the PDF standard, where text is in UTF8 format. Nearly every other instance in a PDF is in one of two other encodings (PDF Doc or UTF16-BE).
To get the correct URI string from this try the following code
byte utf8Bytes = action.GetSDFObj().Get("URI").Value().GetBuffer();
string target = System.Text.Encoding.UTF8.GetString(utf8Bytes);