public Task<DataItem> GetData()
        {
            // Use this to create design time data

            var item = new DataItem("Welcome to MVVM Light [design]");
            return Task.FromResult(item);
        }
        public Task<DataItem> GetData()
        {
            // Use this to connect to the actual data service

            // Simulate by returning a DataItem
            var item = new DataItem("Welcome to MVVM Light");
            return Task.FromResult(item);
        }