using System; 
  using System.Collections.Generic; 
  using System.ComponentModel; 
  using System.Data; 
  using System.Drawing; 
  using System.Linq; 
  using System.Text; 
  using System.Threading.Tasks; 
  using System.Windows.Forms; 
   
  namespace WindowsFormsApplication17 
  { 
      public partial class Form1 : Form 
      { 
          public Form1() 
          { 
              InitializeComponent(); 
          } 
          int a; 
          private void timer1_Tick(object sender, EventArgs e) 
          { 
              a++; 
              label1.Text = a.ToString(); 
              if (b == 0) 
              { 
                  button1.Enabled = false; 
                  timer1.Enabled = false; 
                  timer2.Enabled = false; 
              } 
          } 
          int c; 
          private void button1_Click(object sender, EventArgs e) 
          { 
              if (timer1.Enabled == true)  
              { 
                  timer1.Enabled = false; 
              } 
              else 
              { 
                  timer1.Enabled = true; 
              } 
              if (a % 10 == 0) c++; 
              { 
                  label3.Text = c.ToString(); 
              } 
              if (b == 0) 
              { 
                  button1.Enabled = false; 
                  timer1.Enabled = false; 
                  timer2.Enabled = false; 
              } 
          } 
          int b = 30; 
          private void timer2_Tick(object sender, EventArgs e) 
          { 
              b--; 
              label2.Text = b.ToString(); 
              if (b == 0) 
              { 
                  button1.Enabled = false; 
                  timer1.Enabled = false; 
                  timer2.Enabled = false; 
              } 
          } 
      } 
  }