Krishna

I want to develop app for Tizen TVs models 2015-2018. Means it should run on all the Tizen TVs models available in market till now either that is with Tizen OS 2, Tizen OS 3 or Tizen OS 4. Please suggest me how to start. What technology or framework I have to use. For Tizen 4, Tizen.Net is avaiable, but the problem is it is not supporting Tizen OS 3 or lower version.