Compilation fixes for Leroy's calculator

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace ITCO221_L.Simpkins_Unit4
{
    public partial class frmCalculator : Form
    {
        //class level variables
        double num1;
        double num2;
        double answer;
        string mathOperator = "";

        public frmCalculator()
        {
            InitializeComponent();
        }

        private void InitializeComponent()
        {
            #region "button code"
            {
                this.textBox1 = new System.Windows.Forms.TextBox();
                this.button1 = new System.Windows.Forms.Button();
                this.button2 = new System.Windows.Forms.Button();
                this.button3 = new System.Windows.Forms.Button();
                this.button4 = new System.Windows.Forms.Button();
                this.button5 = new System.Windows.Forms.Button();
                this.button6 = new System.Windows.Forms.Button();
                this.button7 = new System.Windows.Forms.Button();
                this.button8 = new System.Windows.Forms.Button();
                this.button9 = new System.Windows.Forms.Button();
                this.button10 = new System.Windows.Forms.Button();
                this.button11 = new System.Windows.Forms.Button();
                this.button12 = new System.Windows.Forms.Button();
                this.button13 = new System.Windows.Forms.Button();
                this.button14 = new System.Windows.Forms.Button();
                this.button15 = new System.Windows.Forms.Button();
                this.button16 = new System.Windows.Forms.Button();
                this.button17 = new System.Windows.Forms.Button();
                this.button18 = new System.Windows.Forms.Button();
                this.button19 = new System.Windows.Forms.Button();
                this.button20 = new System.Windows.Forms.Button();
                this.button21 = new System.Windows.Forms.Button();
                this.SuspendLayout();
                //
                // textBox1
                //
                this.textBox1.Location = new System.Drawing.Point(303, 12);
                this.textBox1.Name = "textBox1";
                this.textBox1.Size = new System.Drawing.Size(151, 20);
                this.textBox1.TabIndex = 0;
                //
                // button1
                //
                this.button1.Location = new System.Drawing.Point(361, 62);
                this.button1.Name = "button1";
                this.button1.Size = new System.Drawing.Size(75, 23);
                this.button1.TabIndex = 1;
                this.button1.Text = "tan";
                this.button1.UseVisualStyleBackColor = true;
                //
                // button2
                //
                this.button2.Location = new System.Drawing.Point(203, 121);
                this.button2.Name = "button2";
                this.button2.Size = new System.Drawing.Size(75, 23);
                this.button2.TabIndex = 2;
                this.button2.Text = "*";
                this.button2.UseVisualStyleBackColor = true;
                //
                // button3
                //
                this.button3.Location = new System.Drawing.Point(203, 150);
                this.button3.Name = "button3";
                this.button3.Size = new System.Drawing.Size(75, 23);
                this.button3.TabIndex = 3;
                this.button3.Text = "1";
                this.button3.UseVisualStyleBackColor = true;
                //
                // button4
                //
                this.button4.Location = new System.Drawing.Point(203, 91);
                this.button4.Name = "button4";
                this.button4.Size = new System.Drawing.Size(75, 23);
                this.button4.TabIndex = 4;
                this.button4.Text = "sln";
                this.button4.UseVisualStyleBackColor = true;
                //
                // button5
                //
                this.button5.Location = new System.Drawing.Point(203, 62);
                this.button5.Name = "button5";
                this.button5.Size = new System.Drawing.Size(75, 23);
                this.button5.TabIndex = 5;
                this.button5.Text = "C";
                this.button5.UseVisualStyleBackColor = true;
                //
                // button6
                //
                this.button6.Location = new System.Drawing.Point(280, 150);
                this.button6.Name = "button6";
                this.button6.Size = new System.Drawing.Size(75, 23);
                this.button6.TabIndex = 6;
                this.button6.Text = "2";
                this.button6.UseVisualStyleBackColor = true;
                //
                // button7
                //
                this.button7.Location = new System.Drawing.Point(280, 179);
                this.button7.Name = "button7";
                this.button7.Size = new System.Drawing.Size(75, 23);
                this.button7.TabIndex = 7;
                this.button7.Text = "5";
                this.button7.UseVisualStyleBackColor = true;
                //
                // button8
                //
                this.button8.Location = new System.Drawing.Point(280, 124);
                this.button8.Name = "button8";
                this.button8.Size = new System.Drawing.Size(75, 23);
                this.button8.TabIndex = 8;
                this.button8.Text = "-";
                this.button8.UseVisualStyleBackColor = true;
                //
                // button9
                //
                this.button9.Location = new System.Drawing.Point(280, 91);
                this.button9.Name = "button9";
                this.button9.Size = new System.Drawing.Size(75, 23);
                this.button9.TabIndex = 9;
                this.button9.Text = "%";
                this.button9.UseVisualStyleBackColor = true;
                //
                // button10
                //
                this.button10.Location = new System.Drawing.Point(280, 62);
                this.button10.Name = "button10";
                this.button10.Size = new System.Drawing.Size(75, 23);
                this.button10.TabIndex = 10;
                this.button10.Text = "cos";
                this.button10.UseVisualStyleBackColor = true;
                //
                // button11
                //
                this.button11.Location = new System.Drawing.Point(361, 179);
                this.button11.Name = "button11";
                this.button11.Size = new System.Drawing.Size(75, 23);
                this.button11.TabIndex = 11;
                this.button11.Text = "6";
                this.button11.UseVisualStyleBackColor = true;
                //
                // button12
                //
                this.button12.Location = new System.Drawing.Point(361, 150);
                this.button12.Name = "button12";
                this.button12.Size = new System.Drawing.Size(75, 23);
                this.button12.TabIndex = 12;
                this.button12.Text = "3";
                this.button12.UseVisualStyleBackColor = true;
                //
                // button13
                //
                this.button13.Location = new System.Drawing.Point(361, 121);
                this.button13.Name = "button13";
                this.button13.Size = new System.Drawing.Size(75, 23);
                this.button13.TabIndex = 13;
                this.button13.Text = "+";
                this.button13.UseVisualStyleBackColor = true;
                //
                // button14
                //
                this.button14.Location = new System.Drawing.Point(361, 91);
                this.button14.Name = "button14";
                this.button14.Size = new System.Drawing.Size(75, 23);
                this.button14.TabIndex = 14;
                this.button14.Text = "/";
                this.button14.UseVisualStyleBackColor = true;
                //
                // button15
                //
                this.button15.Location = new System.Drawing.Point(203, 179);
                this.button15.Name = "button15";
                this.button15.Size = new System.Drawing.Size(75, 23);
                this.button15.TabIndex = 15;
                this.button15.Text = "4";
                this.button15.UseVisualStyleBackColor = true;
                //
                // button16
                //
                this.button16.Location = new System.Drawing.Point(203, 208);
                this.button16.Name = "button16";
                this.button16.Size = new System.Drawing.Size(75, 23);
                this.button16.TabIndex = 16;
                this.button16.Text = "7";
                this.button16.UseVisualStyleBackColor = true;
                //
                // button17
                //
                this.button17.Location = new System.Drawing.Point(280, 208);
                this.button17.Name = "button17";
                this.button17.Size = new System.Drawing.Size(75, 23);
                this.button17.TabIndex = 17;
                this.button17.Text = "8";
                this.button17.UseVisualStyleBackColor = true;
                //
                // button18
                //
                this.button18.Location = new System.Drawing.Point(361, 208);
                this.button18.Name = "button18";
                this.button18.Size = new System.Drawing.Size(75, 23);
                this.button18.TabIndex = 18;
                this.button18.Text = "9";
                this.button18.UseVisualStyleBackColor = true;
                //
                // button19
                //
                this.button19.Location = new System.Drawing.Point(203, 237);
                this.button19.Name = "button19";
                this.button19.Size = new System.Drawing.Size(75, 23);
                this.button19.TabIndex = 19;
                this.button19.Text = "T";
                this.button19.UseVisualStyleBackColor = true;
                //
                // button20
                //
                this.button20.Location = new System.Drawing.Point(280, 237);
                this.button20.Name = "button20";
                this.button20.Size = new System.Drawing.Size(75, 23);
                this.button20.TabIndex = 20;
                this.button20.Text = "0";
                this.button20.UseVisualStyleBackColor = true;
                //
                // button21
                //
                this.button21.Location = new System.Drawing.Point(361, 237);
                this.button21.Name = "button21";
                this.button21.Size = new System.Drawing.Size(75, 23);
                this.button21.TabIndex = 21;
                this.button21.Text = "=";
                this.button21.UseVisualStyleBackColor = true;
                //
                // Form1
                //
                this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
                this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
                this.ClientSize = new System.Drawing.Size(481, 264);
                this.Controls.Add(this.button21);
                this.Controls.Add(this.button20);
                this.Controls.Add(this.button19);
                this.Controls.Add(this.button18);
                this.Controls.Add(this.button17);
                this.Controls.Add(this.button16);
                this.Controls.Add(this.button15);
                this.Controls.Add(this.button14);
                this.Controls.Add(this.button13);
                this.Controls.Add(this.button12);
                this.Controls.Add(this.button11);
                this.Controls.Add(this.button10);
                this.Controls.Add(this.button9);
                this.Controls.Add(this.button8);
                this.Controls.Add(this.button7);
                this.Controls.Add(this.button6);
                this.Controls.Add(this.button5);
                this.Controls.Add(this.button4);
                this.Controls.Add(this.button3);
                this.Controls.Add(this.button2);
                this.Controls.Add(this.button1);
                this.Controls.Add(this.textBox1);
                this.Name = "Form1";
                this.Text = "Form1";
                this.ResumeLayout(false);
                this.PerformLayout();

            }
        }

            #endregion

        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.Button button2;
        private System.Windows.Forms.Button button3;
        private System.Windows.Forms.Button button4;
        private System.Windows.Forms.Button button5;
        private System.Windows.Forms.Button button6;
        private System.Windows.Forms.Button button7;
        private System.Windows.Forms.Button button8;
        private System.Windows.Forms.Button button9;
        private System.Windows.Forms.Button button10;
        private System.Windows.Forms.Button button11;
        private System.Windows.Forms.Button button12;
        private System.Windows.Forms.Button button13;
        private System.Windows.Forms.Button button14;
        private System.Windows.Forms.Button button15;
        private System.Windows.Forms.Button button16;
        private System.Windows.Forms.Button button17;
        private System.Windows.Forms.Button button18;
        private System.Windows.Forms.Button button19;
        private System.Windows.Forms.Button button20;
        private System.Windows.Forms.Button button21;
    }
}