c sharp ödev sorunum

 
  using System; 
  using System.Drawing; 
  using System.Windows.Forms; 
   
  namespace hatırla 
  { 
   
  	public partial class MainForm : Form 
  	{ 
  		public MainForm() 
  		{ 
   
  			InitializeComponent(); 
  			Width=800; 
  			Height=600; 
  		} 
  		Button[] buttonArray = new Button[81]; 
  		Random sayi = new Random(); 
  		int i; 
  		public void oluştur() 
  		{ 
  		 
  			int horizotal = 50; 
  			int vertical = 50; 
   
  			for (i = 0; i < buttonArray.Length; i++) 
  			{ 
  				buttonArray[i] = new Button(); 
  				buttonArray[i].Tag=sayi.Next(1,9)+","+i; 
  				buttonArray[i].Location = new Point(vertical, horizotal); 
  				if ((i == 8) || (i == 17) || (i == 26) || (i == 35) || (i == 44) || 
  				    (i == 53) || (i == 62) || (i == 71)) 
  				{ 
  					vertical = 50; 
  					horizotal = horizotal + 50; 
  				} 
  				else 
  					vertical = vertical + 80; 
  				Controls.Add(buttonArray[i]); 
  				//buttonArray[i].Text=buttonArray[i].Tag.ToString().Substring(0,1); 
  				buttonArray[i].Click += (ClickButton); 
  					 
  			} 
  			 
  		} 
   
  		int sayaç; 
  		Button btn; 
  		string değer; 
  		int a; 
  		public void ClickButton(Object sender, EventArgs e) 
  		{ 
  			btn = sender as Button; 
  		 
  			if (btn.Tag.ToString().Split(',').GetValue(0).ToString()==değer & a.ToString()!=btn.Tag.ToString().Split(',').GetValue(1).ToString()) { 
  				sayaç++; 
  				btn.Enabled=false; 
  				btn.BackColor=Color.Green; 
  				buttonArray[a].BackColor=Color.Green; 
  				buttonArray[a].Enabled=false; 
  				btn.Text=değer; 
  				buttonArray[a].Text=değer;	 
  			} 
  			a = Convert.ToInt32(btn.Tag.ToString().Split(',').GetValue(1).ToString()); 
  			değer=btn.Tag.ToString().Split(',').GetValue(0).ToString(); 
  			label2.Text=sayaç.ToString(); 
  			 
  		} 
  		void MainFormLoad(object sender, EventArgs e) 
  		{ 
  			oluştur(); 
  		} 
  		 
  		 
  		 
  		 
  	} 
  }