Nokia rolls out the Windows Phone 7.8 update globally to it’s entire set of Windows Phone 7 devices which already have WP7.5 installed. It comes it some new features already available in Windows Phone 8 devices.

Among all the features, the most awaited feature that a WP7.5 user want to see in their screen is the all new Start Screen with those small, medium and large icons.

“What is Dispatcher object and why to use it in application?” - It’s a common question asked by beginners working in various XAML technologies like Silverlight, Windows Phone etc. I came to such instances many time when the developer has no clue about “Cross Thread Exception”.

That is the reason I wanted to publish this post mentioning the use of this Dispatcher object, mainly when you are getting an “Invalid cross-thread access” exception.