This method does not accept null for this parameter. Parameternamn: texture

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

namespace Asteroider
{
    class asteroid
    {
        public Vector2 position;
        public Vector2 direction;
        public int speed;
        public Texture2D texture;
        public int height;
        public int width;
        public bool isVisible = true;
        private Vector2 pos;
        private Vector2 dir;
        private int speed_2;
        private asteroid asteroid_2;

        public asteroid(Vector2 position, Vector2 direction, int speed, Texture2D texture)
        {

          this.position = position;
          this.direction = direction;
          this.speed = speed;
          this.texture = texture;
          height = texture.Height;
          width = texture.Width;

        }

        public asteroid(Vector2 pos, Vector2 dir, int speed_2, asteroid asteroid_2)
        {
            // TODO: Complete member initialization
            this.pos = pos;
            this.dir = dir;
            this.speed_2 = speed_2;
            this.asteroid_2 = asteroid_2;
        }

        public void Update()
        {
            position.X = position.X + speed * direction.X;
            position.Y = position.Y + speed * direction.Y;
        }

        public void Draw( SpriteBatch spriteBatch )
        {
            SpriteEffects spriteEffects = SpriteEffects.None;

            if (isVisible == true)
            {
                spriteBatch.Draw(texture, position, new Rectangle(1, 1, width, height), Color.White, 0, Vector2.Zero, 1, spriteEffects, 1);
            }

        }
    }
}