workbook.SaveAs() not available and ExcelToPdfConverter not support in Universal window App

[anuj]

I am working on an universal window app in C# and  want to create an excel file and save it as pdf. I install syncfusionessentialfileformats.exe  and add reference of Syncfusion.XLsIO.Universal and using Syncfusion.XLsIO in .cs file. I successfully  create excel file but at saving there is no

workbook.SaveAs()function as given on this link http://help.syncfusion.com/file-formats/xlsio/faq 
then I use SaveAsAsync() but i want to save or open in browser as given https://www.syncfusion.com/kb/1976/how-do-i-save-and-open-a-spreadsheet-inside-browser
how open excel file in browser using SaveAsAsync()because SaveAs() function is not available in library.
I try to include   Syncfusion.XLsIO.Base.dll and Syncfusion.ExcelToPDFConverter.Base.dll It give message A reference to
Syncfusion.ExcelToPDFConverter.Base.dll could not be added. The project target '.NetCore' while the file
 reference target '.NetFramework'. This is not supported scenario.
Is it not supported with universal App ?

Thanks

[Dilli Babu Nandha Gopal]

Hi Anuj,

We would like to inform you that we don’t have the support “Need to provide support for ExcelToPdfConverter in UWP” currently and so have logged feature report. The support incidents to track the status of this feature has been created under your account. Please log on to our support website to check for further updates.

https://www.syncfusion.com/account/login?ReturnUrl=%2fsupport%2fdirecttrac%2fincidents  

Please let me know if you have any questions.

Regards,
Dilli babu.