private void PopulateData()
{
ExpenseData = new ObservableCollection <Expense>(_queryHandler.GetDataByCategory());
//TotalValue = ExpenseData.Sum(var => var.Amount).ToString();
////await Task.Run(() =>
//{
// var yearlyExpenses = ExpenseData.GroupBy(year => year.Time.Year).ToList();
// foreach (var yearlyExpense in yearlyExpenses)
// {
// YearlyExpenseData yearlyExpenseData = new YearlyExpenseData { Year = yearlyExpense.Key };
// var monthlyExpenseDetails = yearlyExpense.GroupBy(month => month.Time.ToString("MMM")).ToList();
// foreach (var monthlyExpense in monthlyExpenseDetails)
// {
// yearlyExpenseData.MonthlyData.Add(new MonthlyExpenseData() { Month = monthlyExpense.Key, Amount = monthlyExpense.Sum(var => var.Amount) });
// }
// yearlyExpenseData.TotalExpense = yearlyExpenseData.MonthlyData.Sum(var => var.Amount);
// YearWiseExpenses.Add(yearlyExpenseData);
// }
// //});
//}
}