Pass data between methods in C#

I have the following code in my windows 8 desktop app. This gets data from a web service and populates it in a List SampleDataGroup.

protected override async void LoadState(Object navigationParameter, Dictionary<String, Object> pageState)
 {
    HttpClient client = new HttpClient();
    HttpResponseMessage response = await client.GetAsync("http://localhost:12345/api/items");

    var info = new List<SampleDataGroup>();

    if (response.IsSuccessStatusCode)
    {
        var content = await response.Content.ReadAsStringAsync();

        var item = JsonConvert.DeserializeObject<dynamic>(content);

        foreach (var data in item)
        {
            var infoSect = new SampleDataGroup
            (
                (string)data.Id.ToString(),
                (string)data.Name,
                (string)"",
                (string)data.PhotoUrl,
                (string)data.Description
            );
            info.Add(infoSect);
            //data=infoSect;
        }
    }
    else
    {
        MessageDialog dlg = new MessageDialog("Error");
        await dlg.ShowAsync();
    }
    }

This works fine. But I want to use the data in the above function in another function. I want to use. The properties and values I get from the web service, I would like to use in another function.

private void Item_Click(object sender, RoutedEventArgs e)
{
  //Use (string)data.Name
}

In the click function I want to use the Name, as well as all other data values from the first function.

I tried setting SampleDataGroup data=null; in the code and then using data=infoSect seen commented out above and then call data.Name in the click function but it returns an null exception.

How do i pass data from one function to another?