How to Shuffle a list in C#

Question

So, this is my code:

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using WindowsFormsApplication1;

public partial class Gyuru

{

    static Random random = new System.Random();

    private Graphics gr;

    private Bitmap bmp;

    private bool[,] EzCellak = new bool[5, 10];

    private System.Collections.Generic.List<Golyo> Golyok = new System.Collections.Generic.List<Golyo>();

    private System.Collections.Generic.List<bool[,]> EzSolutions = new System.Collections.Generic.List<bool[,]>();

    private bool EzUserPlay = false;

    private bool Playing = false;

    [System.ComponentModel.Browsable(false)]

    public bool[,] Cellak

    {

        get

        {

            return EzCellak;

        }

        set

        {

            EzCellak = value;

        }

    }

    public System.Collections.Generic.List<bool[,]> Solutions

    {

        get

        {

            return EzSolutions;

        }

        set

        {

            EzSolutions = value;

        }

    }

    public bool UserPlay

    {

        get

        {

            return EzUserPlay;

        }

        set

        {

            EzUserPlay = value;

        }

    }

    public Gyuru()

    {

        InitializeComponent();

        FeluletRajzol();

    }

    private void Gyuru_Paint(object sender, System.Windows.Forms.PaintEventArgs e)

    {

        if (bmp != null)

        {

            this.BackgroundImage = bmp;

        }

    }

    private void Gyuru_Resize(object sender, System.EventArgs e)

    {

        if (bmp != null)

        {

            FeluletRajzol();

        }

    }

    public void FeluletRajzol()

    {

        if (this.Width > 0 && this.Height > 0)

        {

            bmp = new Bitmap(this.Width, this.Height, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);

            gr = Graphics.FromImage(bmp);

            System.Drawing.Drawing2D.LinearGradientBrush br = null;

            RectangleF rect = new RectangleF();

            //////////////////////////////////////////////////////////////////////

            for (byte i = 0; i <= 1; i++)

            {

                for (byte j = 0; j <= 9; j++)

                {

                    rect = new RectangleF((float)(j * System.Convert.ToSingle(bmp.Width / 8.0)), (float)(i * System.Convert.ToSingle(bmp.Height / 5.0) + 15), System.Convert.ToSingle(bmp.Width / 8.0), System.Convert.ToSingle(bmp.Height / 8.0));

                    br = new System.Drawing.Drawing2D.LinearGradientBrush(rect, Color.White, Color.Black, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal);

                    gr.FillRectangle(br, rect);

                    Golyok.Add(new Golyo(i, j, "PIROS"));

                    gr.FillEllipse(new System.Drawing.Drawing2D.LinearGradientBrush(rect, Color.Red, Color.Black, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal), rect);

                }

            }

            for (byte i = 1; i <= 2; i++)

            {

                for (byte j = 0; j <= 9; j++)

                {

                    rect = new RectangleF((float)(j * System.Convert.ToSingle(bmp.Width / 8.0)), (float)(i * System.Convert.ToSingle(bmp.Height / 5.0) + 15), System.Convert.ToSingle(bmp.Width / 8.0), System.Convert.ToSingle(bmp.Height / 8.0));

                    br = new System.Drawing.Drawing2D.LinearGradientBrush(rect, Color.White, Color.Black, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal);

                    gr.FillRectangle(br, rect);

                    Golyok.Add(new Golyo(i, j, "ZOLD"));

                    gr.FillEllipse(new System.Drawing.Drawing2D.LinearGradientBrush(rect, Color.Green, Color.Black, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal), rect);

                }

            }

            for (byte i = 2; i <= 3; i++)

            {

                for (byte j = 0; j <= 9; j++)

                {

                    rect = new RectangleF((float)(j * System.Convert.ToSingle(bmp.Width / 8.0)), (float)(i * System.Convert.ToSingle(bmp.Height / 5.0) + 15), System.Convert.ToSingle(bmp.Width / 8.0), System.Convert.ToSingle(bmp.Height / 8.0));

                    br = new System.Drawing.Drawing2D.LinearGradientBrush(rect, Color.White, Color.Black, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal);

                    gr.FillRectangle(br, rect);

                    Golyok.Add(new Golyo(i, j, "SARGA"));

                    gr.FillEllipse(new System.Drawing.Drawing2D.LinearGradientBrush(rect, Color.Yellow, Color.Black, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal), rect);

                }

            }

            for (byte i = 3; i <= 4; i++)

            {

                for (byte j = 0; j <= 9; j++)

                {

                    rect = new RectangleF((float)(j * System.Convert.ToSingle(bmp.Width / 8.0)), (float)(i * System.Convert.ToSingle(bmp.Height / 5.0) + 15), System.Convert.ToSingle(bmp.Width / 8.0), System.Convert.ToSingle(bmp.Height / 8.0));

                    br = new System.Drawing.Drawing2D.LinearGradientBrush(rect, Color.White, Color.Black, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal);

                    gr.FillRectangle(br, rect);

                    Golyok.Add(new Golyo(i, j, "KEK"));

                    gr.FillEllipse(new System.Drawing.Drawing2D.LinearGradientBrush(rect, Color.Blue, Color.Black, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal), rect);

                }

            }

            for (byte i = 4; i <= 5; i++)

            {

                for (byte j = 0; j <= 9; j++)

                {

                    rect = new RectangleF((float)(j * System.Convert.ToSingle(bmp.Width / 8.0)), (float)(i * System.Convert.ToSingle(bmp.Height / 5.0) + 15), System.Convert.ToSingle(bmp.Width / 8.0), System.Convert.ToSingle(bmp.Height / 8.0));

                    br = new System.Drawing.Drawing2D.LinearGradientBrush(rect, Color.White, Color.Black, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal);

                    gr.FillRectangle(br, rect);

                    Golyok.Add(new Golyo(i, j, "NARANCS"));

                    gr.FillEllipse(new System.Drawing.Drawing2D.LinearGradientBrush(rect, Color.Orange, Color.Black, System.Drawing.Drawing2D.LinearGradientMode.ForwardDiagonal), rect);

                }

            }

            //////////////////////////////////////////////////////////////////////

        }

    }

    

   

     

}

A picture: 

http://imageshack.us/photo/my-images/571/capturegld.png/

How could i shuffle the colors?