Below is a sample code snippet demonstrating Search for an App in Windows Phone Store using URI Scheme from WP8 App via the URI Scheme and LaunchUriAsync method in Windows Phone using C#.
How to Search for an App by Publisher in Windows Phone Store using URI Scheme from WP8 App?
// Function to Search for an App by publisher in Windows Phone Store using URI Scheme in Windows Phone 8 using C#.
private async System.Threading.Tasks.Task SearchForAnApp()
{
await Launcher.LaunchUriAsync(new Uri("zune:search?publisher=Abundantcode"));
}