Asynchronous file loading for Metro styled applications using DirectX/C++

DirectXHelper.h

inline Concurrency::task<Platform::String^> ReadStringAsync(Platform::String^ filename)
{
	using namespace Windows::Storage;
	using namespace Concurrency;
		
	auto folder = Windows::ApplicationModel::Package::Current->InstalledLocation;
		
	task<StorageFile^> getFileTask(folder->GetFileAsync(filename));

	auto readBufferTask = getFileTask.then([] (StorageFile^ f) 
	{
		return FileIO::ReadBufferAsync(f);
	});

	auto byteArrayTask = readBufferTask.then([] (Streams::IBuffer^ b) -> Platform::String^
	{
		return Streams::DataReader::FromBuffer(b)->ReadString(b->Length);
	});

	return byteArrayTask;
}