<CheckBox Content="Bound to IsChecked"
        HorizontalAlignment="Center"
        VerticalAlignment="Center"
        IsChecked="{Binding IsChecked, Mode=OneWay}" />
<TextBlock Text="{Binding IsChecked, StringFormat='Actual IsChecked value: {0}'}" />
<Button Content="Raise property changed"
        Command="{Binding RaisePropertyChangedCommand}" />

private bool _isChecked;
public bool IsChecked
{
        get => _isChecked;
        set
        {
                _isChecked = value;
                OnPropertyChanged();
        }
}
public RelayCommand RaisePropertyChangedCommand { get; }

public MainWindowViewModel()
{
        RaisePropertyChangedCommand = new RelayCommand(ExecuteRaisePropertyChanged);
}

private void ExecuteRaisePropertyChanged()
{
        OnPropertyChanged(nameof(IsChecked));
}