I am trying to create an instance of StorageFile in my class library...

var localFolder = ApplicationData.Current.LocalFolder;
StorageFile destinationFile = await localFolder.CreateFileAsync(destination, CreationCollisionOption.GenerateUniqueName);

VS11 is not building say: 'await' requires that the type 'Windows.Foundation.IAsyncOperation' have a suitable GetAwaiter method. Are you missing a using directive for 'System'?

obviously I am using .net 4.5 as target and I am referencing Windows Assemblies... not sure why this code work in MetroStyle but does not build in a class library... How can I create an instance of Storagefile in a class library??? at this stage it is not important if the file is created in an async way...

pls let me know your thoughts... Stelio

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