How to track pressing multiple WPF keys at once?

Question

WPF

I'm making a game in WPF and ran into a problem.
We know that you can add a KeyDown event handler to an element.
I have a motion keypress handling function like this:

private void Window_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Right)
            {
                this.player.x += this.player.speed;
                this.player.character.Margin = new Thickness(this.player.x, this.player.y, 0, 0);
            }

            if (e.Key == Key.Left)
            {
                this.player.x -= this.player.speed;
                this.player.character.Margin = new Thickness(this.player.x, this.player.y, 0, 0);
            }
        }

But here it processes only one key, and not several at once (let's say down and to the left).

Answer 1

private void Window_KeyDown(object sender, KeyEventArgs e)
        {
            if(Keyboard.IsKeyDown(Key.Left) && Keyboard.IsKeyDown(Key.Down))
            {
                MessageBox.Show("Нажаты клавиши вниз и влево");
            }
        }