Notes

{
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;

public partial class Form1 : Form
{
public Form1() { InitializeComponent(); }

Random rnd = new Random();
Timer timer = new Timer();
//int[] mayinlar = new int[30];
//List<int> mayinlars = new List<int>();

private void Form1_Load(object sender, EventArgs e)
{
this.Size = new Size(560, 583);
this.Text = "Mayın Tarlası";
timer.Interval = 100;
timer.Tick += Timer_Tick;

#region Örnek 1
//for (int i = 0; i < 30; i++)
//{
// int sayi = rnd.Next(1, 290); // min : 1, max : 289
// // dizinin içerisinde sayı yok ise.

// //if (Array.Exists(mayinlar, x => x != sayi))
// if (Array.IndexOf(mayinlar, sayi) == -1)
// {
// mayinlar[i] = sayi;
// }
// else
// {
// i--;
// }
//}

//Array.Sort(mayinlar);
#endregion

#region Örnek 2
//while (mayinlars.Count() < 30)
//{
// int sayi = rnd.Next(1, 290);

// if (!mayinlars.Contains(sayi))
// {
// mayinlars.Add(sayi);
// }
//}
//mayinlars.Sort();
#endregion

int[] mayinlar = Enumerable.Range(1, 290).OrderBy(x => Guid.NewGuid()).Take(30).ToArray();

for (int i = 1; i < 290; i++)
{
// instance (yeni bir örnek) alma
PictureBox pcb = new PictureBox();
pcb.Width = 30;
pcb.Height = 30;
//pcb.BackColor = Color.Tomato;
pcb.BackColor = Color.FromArgb(rnd.Next(256), rnd.Next(256), rnd.Next(256));
pcb.Margin = new Padding(1);
pcb.Tag = Array.Exists(mayinlar, x => x == i) ? true : false;
pcb.Click += Pcb_Click;
flowLayoutPanel1.Controls.Add(pcb);
}
timer.Start();
}

private void Pcb_Click(object sender, EventArgs e)
{
throw new NotImplementedException();
}

private void Timer_Tick(object sender, EventArgs e)
{
foreach (Control control in flowLayoutPanel1.Controls)
{
control.BackColor = Color.FromArgb(rnd.Next(256), rnd.Next(256), rnd.Next(256));
}
}

private void Form1_SizeChanged(object sender, EventArgs e)
{
//this.Text = this.Size.ToString();
}


}
}