public async Task <string> QueryBloodType()
{
NSError error;
string resultString = string.Empty;
await Task.Factory.StartNew(() => resultString = m_healthKitStore.GetBloodType (out error).BloodType.ToString());
HealthKitDataContext.ActiveHealthKitData.BloodType = ParseBloodTypeString(resultString);
Console.WriteLine(ParseBloodTypeString(resultString));
return(ParseBloodTypeString(resultString));
}