Unfortunately this dose not solve the problem as I was already using Tobii.Interaction. I am still getting the same error and unable to run the code.
using Tobii.Interaction;
using Tobii.Interaction.Wpf;
I am using these two libraries. I tried to put others but it shows me that they are unused. I found another code in example under “Getting Started with WPF Application” in following link : https://tobii.github.io/CoreSDK/articles/getting_started.html. which is using
using Tobii.EyeX.Wpf;
I tried this also but it show me error. Please let me know what should I do now.