Hey @kiran​! Daniel from Customer Support Engineering here 🔧 

At the moment, while it is possible to integrate the Messenger with a desktop application, it's not something that we officially support right now. The basic Intercom installation was designed to be used in web apps/sites, so some unexpected behaviour can occur on desktop apps. I can't say for certain if the Messenger has been set up on a WPF application in the past. Here's hoping that another forum member might have tried this before and will have some advice for you 🤞