Create an IoT app on Raspberry Pi using ASP.net

Can someone with experience point me in the right direction? I want to create an IoT device using a Pi with a small touchscreen for a UI. Apparently you can’t use net to create a form on the pi, so it seems my only option is a web form. I don’t have much experience with Linux and python but I know windows and C#. I don’t have a lot of resources for learning ASP so can you help me with the bare minimum of what I need to learn to complete my project? I’m looking to just use the web server only on the pi as a gui.