Draw underline / striketrough styled text with a custom font Declined - Already Implemented

I would like to use underline /strikethrough styles with custom fonts in writing PDF documents.

This is possible by using PdfTrueTypeFont constructors that take a System.Drawing.Font or a filePath string , a size (float) and a PdfFontStyle as parmeters,  though these consructors are not cross-platform. (I assume because rely on GDI(+) APIs under the hood. - In case of System.Drawing.Font, this is directly confirmed in Microsoft's documentation. ( https://docs.microsoft.com/en-us/dotnet/api/system.drawing?#remarks ) )

I am writing a PDF document from within a Windows Service, where (using APIs) relying on GDI(+) is not recommended, so the only way to use a custom font will be the constructor taking a Stream as an input. However, this constructor has no overload that takes a PdfFontStyle enum as additional parameter.

Is there a way to still apply underline/strikethrough with custom (OTF/TTF) fonts given this restriction? (having to manually draw lines is not really a solution) 

At first sight, this seems to work for me in a test application:

                var str = File.OpenRead(@"C:\windows\fonts\times.ttf");

                var ctor = typeof(PdfTrueTypeFont).GetConstructor(BindingFlags.Instance | BindingFlags.NonPublic, null, new[]

                {

                    typeof(Stream), // fontStream,

                    typeof(float), // size,

                    typeof(string), // metricsName,

                    typeof(bool), // isEnableEmbedding,

                    typeof(PdfFontStyle) // fontStyle)

                }, null);

                var font2 = (PdfFont)ctor.Invoke(new object[] { str, 12f, string.Empty, true, PdfFontStyle.Underline | PdfFontStyle.Strikeout });