XNA 2D Camera + Player Tracking

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;

namespace TestGame
{
    static class Program
    {
        static void Main(string[] args)
        {
            using (TestGame game = new TestGame())
            {
                game.Run();
            }
        }
    }

    public class Player
    {
        public Player(Texture2D texture, Vector2 position, Camera2D camera, Vector2 screenDimensions)
        {
            Texture = texture;
            Position = position;
            ScreenDimension = screenDimensions;
            Camera = camera;
        }

        protected void Move(float x, float y)
        {

            Position.X += x;

            if ((Position.X < Camera.Min.X))
                Position.X = Camera.Min.X;

            if ((Position.X + Width) > Camera.Max.X)
                Position.X = Camera.Max.X - Width;

            float centerX = Position.X + (Width / 2);

            if (centerX > (Camera.Min.X + (ScreenDimension.X / 2)))
            {
                if (centerX < (Camera.Max.X - (ScreenDimension.X / 2)))
                {
                    Camera.Move(-x, 0);
                }
                else
                {
                    Camera.SetPosition(-(Camera.Max.X - ScreenDimension.X), Camera.Position.Y);
                }
            }
            else
            {
                Camera.SetPosition(Camera.Min.X, Camera.Position.Y);
            }

            Position.Y += y;

            if ((Position.Y < Camera.Min.Y))
                Position.Y = Camera.Min.Y;

            if ((Position.Y + Texture.Width) > Camera.Max.Y)
                Position.Y = Camera.Max.Y - Height;

            float centerY = Position.Y + (Height / 2);

            if (centerY > (Camera.Min.Y + (ScreenDimension.Y / 2)))
            {
                if (centerY < (Camera.Max.Y - (ScreenDimension.Y / 2)))
                {
                    Camera.Move(0, -y);
                }
                else
                {
                    Camera.SetPosition(Camera.Position.X, -(Camera.Max.Y - ScreenDimension.Y));
                }
            }
            else
            {
                Camera.SetPosition(Camera.Position.X, Camera.Min.Y);
            }
        }

        public float Width { get { return Texture.Width; } }
        public float Height { get { return Texture.Height; } }

        public Camera2D Camera;
        public Texture2D Texture;
        public Vector2 Position;
        public Vector2 ScreenDimension;

        public void Update(GameTime gameTime)
        {
            if (Keyboard.GetState().IsKeyDown(Keys.Left))
                Move(-gameTime.ElapsedGameTime.Milliseconds, 0);

            if (Keyboard.GetState().IsKeyDown(Keys.Right))
                Move(gameTime.ElapsedGameTime.Milliseconds, 0);

            if (Keyboard.GetState().IsKeyDown(Keys.Up))
                Move(0, -gameTime.ElapsedGameTime.Milliseconds);

            if (Keyboard.GetState().IsKeyDown(Keys.Down))
                Move(0, gameTime.ElapsedGameTime.Milliseconds);

        }

        public void Draw(SpriteBatch spriteBatch, GameTime gameTime)
        {
            spriteBatch.Begin(SpriteSortMode.Deferred, BlendState.AlphaBlend, SamplerState.LinearClamp, DepthStencilState.None, RasterizerState.CullCounterClockwise, null, Camera.Transformation);

            // Static object to show that the camera is moving
            spriteBatch.Draw(Texture, new Vector2(0, (ScreenDimension.Y / 2) - (Texture.Height / 2)), Color.White);
            spriteBatch.Draw(Texture, Position, Color.White);
            spriteBatch.Draw(Texture, new Vector2(Camera.Max.X - (Texture.Width), (ScreenDimension.Y / 2) - (Texture.Height / 2)), Color.White);

            spriteBatch.End();
        }
    }

    public class Camera2D
    {
        public Camera2D(Vector2 min, Vector2 max)
        {
            Min = min;
            Max = max;
            Position = Vector2.Zero;
            Scale = 1f;
            Rotation = 0;
        }

        public void Move(float x, float y)
        {
            position.X += x;
            position.Y += y;
        }

        public void Zoom(float value) { Scale = Math.Max(Scale + value, 0.01f); }
        public void Rotate(float value) { Rotation += value; }
        public void SetPosition(float x, float y) { position.X = x; position.Y = y; }

        private Vector2 min, max, position;

        public Vector2 Min { get { return min; } set { min = value; } }
        public Vector2 Max { get { return max; } set { max = value; } }

        public Vector2 Position
        {
            get { return position; }
            protected set { position = value; }
        }

        public float Rotation { get; protected set; }
        public float Scale { get; protected set; }

        public Matrix Transformation
        {
            get
            {
                return
                    Matrix.CreateScale(Scale) *
                    Matrix.CreateRotationZ(MathHelper.ToRadians(Rotation)) *
                    Matrix.CreateTranslation(Position.X, Position.Y, 0);
            }
        }
    }

    public class TestGame : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;

        Player player;
        Camera2D camera;

        public TestGame()
        {
            graphics = new GraphicsDeviceManager(this);

            graphics.PreferredBackBufferWidth = 1280;
            graphics.PreferredBackBufferHeight = 720;

            Content.RootDirectory = "Content";

        }

        protected override void Initialize()
        {
            base.Initialize();
        }

        protected override void LoadContent()
        {
            spriteBatch = new SpriteBatch(GraphicsDevice);

            camera = new Camera2D(Vector2.Zero, new Vector2(2560, 720));
            player = new Player(Content.Load<Texture2D>("player"), new Vector2(100, 0), camera, new Vector2(graphics.PreferredBackBufferWidth, graphics.PreferredBackBufferHeight));
        }

        protected override void UnloadContent()
        {
        }

        protected override void Update(GameTime gameTime)
        {
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
                this.Exit();

            this.Window.Title = player.Position.ToString() + " / " + camera.Position.ToString();

            player.Update(gameTime);

            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.CornflowerBlue);

            player.Draw(spriteBatch, gameTime);

            base.Draw(gameTime);
        }
    }
}