On Screen Keyboard

public class OnScreenKeyboard : DrawableGameComponent {
        ContentManager Content;
        SpriteBatch SpriteBatch;
        SpriteBatch SpriteBatch2;
        SpriteFont Font;

        string [] KeyLines = { "QWERTYUIOP", "ASDFGHJKL", "ZXCVBNM" };
        string Keys = "QWERTYUIOPASDFGHJKLZXCVBNM";
        List<Vector2> KeyLocations;

        public string KeyPressed { get; private set; }

        public OnScreenKeyboard(Game Game)
            : base(Game) {
                Game.Components.Add(this);

                KeyPressed = "";
                KeyLocations = new List<Vector2>();
        }

        protected override void LoadContent() {
            if (Content == null)
                Content = new ContentManager(Game.Services, "Content");

            SpriteBatch = new SpriteBatch(Game.GraphicsDevice);
            SpriteBatch2 = new SpriteBatch(Game.GraphicsDevice);
            Font = Content.Load<SpriteFont>("Fonts/Keyboard");

            base.LoadContent();
        }

        public override void Draw(GameTime gameTime) {
            KeyLocations.Clear();

            int ARW = Game.GraphicsDevice.Viewport.Width / 2;
            int YPos = Game.GraphicsDevice.Viewport.Width - 10 - (int)((Font.MeasureString("A").Y + Font.LineSpacing) * 6.5f);

            List<int> Xs = new List<int>();
            List<int> Ys = new List<int>();

            SpriteBatch.Begin();

            foreach (string s in KeyLines) {
                SpriteBatch.DrawString(Font, s, new Vector2(ARW - (Font.MeasureString(s).X / 2), YPos), Color.White);

                Xs.Add((int)(ARW - (Font.MeasureString(s).X / 2)));
                Ys.Add(YPos);

                YPos += Font.LineSpacing;
            }

            int x = 0;
            int y = 0;
            int z = 0;

            foreach (char c in Keys) {
                if (x >= KeyLines[y].Length) {
                    x = 0;
                    y++;
                    z++;
                }

                KeyLocations.Add(new Vector2(Xs[z] + (Font.MeasureString(c.ToString()).X * x + 1), Ys[z]));

                x++;
            }

            ReadInput(new Rectangle(Xs[0] - 5, Ys[0] - 5, (int)Font.MeasureString("QWERTYUIOP").X + 5, (int)Font.LineSpacing * 3));

            SpriteBatch.End();
            base.Draw(gameTime);
        }

        void ReadInput(Rectangle BoundingRectangle) {
            int i = 0;

            if (InputManager.IsLeftMouseClick) {
                foreach (Vector2 v in KeyLocations) {
                    i++;
                    Rectangle r = new Rectangle((int)v.X, (int)v.Y, (int)Font.MeasureString("A").X, (int)Font.MeasureString("A").Y);


                    if (r.Contains((int)InputManager.MousePosition.X, (int)InputManager.MousePosition.Y))
                        KeyPressed = Keys[i - 1].ToString();
                }

                if (!BoundingRectangle.Contains((int)InputManager.MouseX, (int)InputManager.MouseY))
                    KeyPressed = "null";
            }
        }
    }