C# для профессионалов. Том II

   this.txtSign.Location = new System.Drawing.Point(160, 136);
   this.txtSign.Name = 'txtSign';
   this.tхtSign.TabIndех = 1;
   this.txtSign.Text = '';
   //
   // cmdShowResults
   //
   this.cmdShowResults.Location = new System.Drawing.Point(24, 96);
   this.cmdShowResults.Name = 'cmdShowResults';
   this.cmdShowResults.Size = new System.Drawing.Size(88, 23);
   this.cmdShowResults.TabIndex = 3;
   this.cmdShowResults.Text = 'Show Results';
   this.cmdShowResults.Click +=
    new System.EventHandler(this.OnClickShowResults);
   //
   // label3
   //
   this.label3.Location = new System.Drawing.Point(72, 24);
   this.label3.Name = 'label3';
   this.label3.Size = new System.Drawing.Size(80, 23);
   this.label3.TabIndex = 6;
   this.label3.Text = 'Input a number';
   //
   // label4
   //
   this.label4.Location = new System.Drawing.Point(80, 184);
   this.label4.Name = 'label4';
   this.label4.Size = new System.Drawing.Size(80, 16);
   this.label4.TabIndex = 7;
   this.label4.Text = 'Square root is';
   //
   // label1
   //
   this.label1.Location = new System.Drawing.Point(112, 136);
   this.label1.Name = 'label1';
   this.label1.Size = new System.Drawing.Size(40, 23);
   this.label1.TabIndex = 4;
   this.label1.Text = 'Sign is';
   //
   // label2
   //
   this.label2.Location = new System.Drawing.Point(48, 184);
   this.label2.Name = 'label2';
   this.label2.Size = new System.Drawing.Size(8, 8);
   this.label2.TabIndex = 5;
   //
   // txtResult
   //
   this.txtResult.Enabled = false;
   this.txtResult.Location = new System.Drawing.Point(160, 184);
   this.txtResult.Name = 'txtResult';
   this.txtResult.TabIndex = 2;
   this.txtResult.Text = '';
   //
   // Form1
   //
   this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
   this.ClientSize = new System.Drawing.Size(292, 269);
   this.Controls.AddRange(new System.Windows.Forms.Control[] {
    this.label4, this.label3, this.label2, this.label1,
    this.cmdShowResults, this.txtResult, this.txtSign, this.txtNumber
   });
   this.Name = 'Form1';
   this.Text = 'Square Root C# Sample';
   this.ResumeLayout(false);
  }
#endregion
  /// <summary>
  /// Обработчик событий для нажатия пользователем кнопки Show Results
  /// Выводит квадратный корень и знак числа
  /// </summary>
  /// <param name='sender'></param>
  /// <param name='e'></param>
  private void OnClickShowResults(object sender, System.EventArgs e) {
   float NumberInput = float.Parse(this.txtNumber.Text);
   if (NumberInput < 0) {
    this.txtSign.Text = 'Negative';
    this.txtResult.Text = Math.Sqrt(-NumberInput) + ' i';
   } else if (NumberInput == 0) {
    txtSign.Text = 'Zero';
    txtResult.Text = '0';
   } else {
    this.txtSign.Text = 'Positive';
    this.txtResult.Text = Math.Sqrt(NumberInput).ToString();
   }
  }
 }
 class MainEntryClass {
  /// <summary>
  /// Основная точка входа приложения.
  /// </summary>
  [STAThread]
  static void Main() {
   SquareRootForm TheMainForm = new SquareRootForm();
   Application.Run(TheMainForm);
  }
 }