private void button1_Click(object sender, RoutedEventArgs e)
 {
     try
     {
         ulong mod = ulong.Parse(modTb.Text);
         var   opr = checkBox1.IsChecked;
         if (opr == true)
         {
             var roo        = IntegerMath.FindPrimitiveRoot(mod);
             var strBuilder = new StringBuilder();
             strBuilder.Append(roo + ";" + Environment.NewLine);
             ResultTb.Text  = strBuilder + Environment.NewLine;
             ResultTb.Text += "Найден один примитивный элемент!";
         }
         else
         {
             var roots      = IntegerMath.FindAllPrimitiveRoots(mod);
             var strBuilder = new StringBuilder();
             int count      = 0;
             foreach (var root in roots)
             {
                 count++;
                 strBuilder.Append(root + ";" + Environment.NewLine);
             }
             ResultTb.Text  = strBuilder + Environment.NewLine;
             ResultTb.Text += "Всего примитивных элементов в GF(" + mod + ") = " + count;
         }
     }
     catch (Exception ex)
     {
         ResultTb.Text = "";
         MessageBox.Show(ex.Message);
     }
 }