move

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 WindowsGame2
{
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics; //экран
        SpriteBatch spriteBatch;  //Перо для рисования

        Texture2D tex;
        Rectangle rec;
        int speed = 5;
        int PanelW, PanelH;


        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
        }

        protected override void Initialize()
        {
            //Выполняется при старте
            base.Initialize();
        }

            //После старта. Загрузка контента в программу.
        protected override void LoadContent()
        {
            spriteBatch = new SpriteBatch(GraphicsDevice);

            tex = Content.Load<Texture2D>("187806-earthwormjim");
            rec = new Rectangle(100, 100, 100, 100*tex.Height/tex.Width);

            PanelW = graphics.PreferredBackBufferWidth;
            PanelH = graphics.PreferredBackBufferHeight;
        }

            //Изменение логики игры, до отрисовки.
        int t = 1;

        protected override void Update(GameTime gameTime)
        {


            if (Keyboard.GetState().IsKeyDown(Keys.Right))
            {
                rec.X += speed;
            }
            if (Keyboard.GetState().IsKeyDown(Keys.Down))
            {
                rec.Y += speed;
            }
            if (Keyboard.GetState().IsKeyDown(Keys.Left))
            {
                rec.X -= speed;
            }
            if (Keyboard.GetState().IsKeyDown(Keys.Up))
            {
                rec.Y -= speed;
            }


            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {




            GraphicsDevice.Clear(Color.White);
            //Отрисовка игры
            spriteBatch.Begin();
            spriteBatch.Draw(tex, rec, Color.White);
            spriteBatch.End();

            base.Draw(gameTime);
        }
    }
}