You can use SAML if you make your application SAML aware and can consume SAML assertions. Okta no longer provides/maintains SAML libraries for .Net, so you are on your own for that part of the solution. The reason for this is that WSFED is native to .Net and typically easier to configure.
I hope that answers your question. If not, please let me know.
Original Author: Eric Knittel, Area Professional Services Director, East