title: Avoid hanging UI in WPF app
body: <p>Iam new to MVVM and WPF.  MY WPF app will call web service every 2 min and display the response in UI. Provide a chance to manually call same web service by clicking a button in UI. My web service timeout is 5000ms.  My Q is if web service take more than 1000ms How  to avoid hanhing UI. Plz  provide some hints to implement </p>