Fixing screen resolution

I have the following code attached to my camera.

void Start()

{
	float targetaspect = 16.0f / 9.0f;
	float windowaspect = (float)Screen.width / (float)Screen.height;
	float scaleheight = windowaspect / targetaspect;
	Camera camera = GetComponent<Camera>();
	
	if (scaleheight < 1.0f)
	{
		Rect rect = camera.rect;
		rect.width = 1.0f;
		rect.height = scaleheight;
		rect.x = 0;
		rect.y = (1.0f - scaleheight) / 2.0f;
		camera.rect = rect;
	}
	else 
	{
		float scalewidth = 1.0f / scaleheight;
		Rect rect = camera.rect;
		rect.width = scalewidth;
		rect.height = 1.0f;
		rect.x = (1.0f - scalewidth) / 2.0f;
		rect.y = 0;
		camera.rect = rect;
	}
}

But, there are two, like borders, above and below the game-screen.
Is there any chance to make them disappear?

Well, you’ve asked for a 16:9 aspect ratio. If your screen isn’t 16:9, then either it needs to have some blank bars at the left/right or top/bottom edges. That’s what the if() is for. You’re getting the bars across the top and bottom, so must be hitting the code at line 11.