This could be a telephonic or Skype call, a manager along with a tech lead will drive this round. Firstly you could hear lot about the company "what they are" "what they do" and brief introduction about the individuals who drive this round. As such, you are allowed to tell about you brief "what you are" and "what you do".Post that you will likely to explain about your current project and the framework which followed in your project may be agile or scrum. There may be lot of questions regarding your agile process.You should be able to answer about xaml bindings,notify property change,custom user control, prism, event aggregate,data grid, performance in binding large data as well as few 'c#' coding part. End of this round you will be announced to complete a task in WPF having defined a timeline. Just reconfirm the timeline since you may get confused via agency person.