c#
TaskList = new ObservableCollection<TaskItem>();

c#
TaskList = new ObservableCollection<TaskItem>();

namespace NoGoogle_MVVM_Test.ViewModel {
    class MainWindow_ViewModel
    {
        private string displayText;

        public string DisplayText {
            get { return displayText; }
            set { displayText = value; }
        }

    }
}

namespace NoGoogle_MVVM_Test.ViewModel {
    class MainWindow_ViewModel
    {
        private string displayText;

        public string DisplayText {
            get { return displayText; }
            set { displayText = value; }
        }

    }
}

namespace Basic_Tutorial_Rerun.MVVM {

    internal class ViewModel_Base : INotifyPropertyChanged {

        public event PropertyChangedEventHandler? PropertyChanged;

        protected void OnPropertyChanged([CallerMemberName] string propertyName = null) {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

    }
}

namespace Basic_Tutorial_Rerun.MVVM {

    internal class ViewModel_Base : INotifyPropertyChanged {

        public event PropertyChangedEventHandler? PropertyChanged;

        protected void OnPropertyChanged([CallerMemberName] string propertyName = null) {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

    }
}