When importing a document containing an EI keyword not followed by space or return an exception is thrown: EndOfStreamException: 'Attempted to read past the end of the stream.'

When importing a PDF document and parsing a name start character followed by a dictionary end one an exception is thrown: System.InvalidOperationException: 'Stack empty.'

With the current implementation, the permissions are ignored on import.

As a side note, there is an option to set permissions on export: UserAccessPermissions.

Importing a document containing an EI keyword within the image stream leads to an endless loop and the document is not imported successfully.

Setting a filter on a mask results in an invalid file when exporting. 

Workaround: Set the filer like this:

PdfFormatProvider provider = new PdfFormatProvider();
provider.ExportSettings.ImageCompression = new ImageFilterTypes[] { ImageFilterTypes.FlateDecode };

When using an ImageSharp version bigger than 2.0 an exception is thrown: "MissingMethodException: 'Method not found: 'SixLabors.ImageSharp.Image SixLabors.ImageSharp.Image.Load(Byte[], SixLabors.ImageSharp.Formats.IImageFormat ByRef)'."

Workaround: Downgrade to a lower ImageSharp version or use a custom implementation of ImagePropertiesResolverBase/JpegImageConverter.

When the indirect object contains more spaces between the object number and the generation number the object content is not successfully parsed.

Expected: one space

Actual: more than one space