Getting AppID for Windows Phone in Unity3d

I am developing game for windows phone in unity3d, I have inserted Rate me button in game but on run time in windows phone it didn't work, is there any method to access AppID for the current application running in windows phone developed in Unity3d. I need code in unity3d CSharp for getting AppID.

Thanks

I tried this C# code in Unity but It didn't work and having error no keywork found windows.

 string appId = Windows.ApplicationModel.Store.CurrentApp.AppId.ToString();
 LinkUri = new Uri("http://ift.tt/17Z4Zoc" + appId, UriKind.Absolute)

Here i needed AppID to complete my link for rate me.