C sharp - Tutorial incompleto?

1º ARCHIVO

namespace WindowsFormsApplication1

{

    partial class Form1

    {

        /// <summary>

        /// Required designer variable.

        /// </summary>

        private System.ComponentModel.IContainer components = null;

        /// <summary>

        /// Clean up any resources being used.

        /// </summary>

        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>

        protected override void Dispose(bool disposing)

        {

            if (disposing && (components != null))

            {

                components.Dispose();

            }

            base.Dispose(disposing);

        }

        #region Windows Form Designer generated code

        /// <summary>

        /// Required method for Designer support - do not modify

        /// the contents of this method with the code editor.

        /// </summary>

        private void InitializeComponent()

        {

            this.button1 = new System.Windows.Forms.Button();

            this.label1 = new System.Windows.Forms.Label();

            this.label2 = new System.Windows.Forms.Label();

            this.label3 = new System.Windows.Forms.Label();

            this.comboBox1 = new System.Windows.Forms.ComboBox();

            this.comboBox2 = new System.Windows.Forms.ComboBox();

            this.comboBox3 = new System.Windows.Forms.ComboBox();

            this.SuspendLayout();

            // 

            // button1

            // 

            this.button1.Location = new System.Drawing.Point(77, 174);

            this.button1.Name = "button1";

            this.button1.Size = new System.Drawing.Size(75, 23);

            this.button1.TabIndex = 0;

            this.button1.Text = "Actualizar";

            this.button1.UseVisualStyleBackColor = true;

            this.button1.Click += new System.EventHandler(this.button1_Click);

            // 

            // label1

            // 

            this.label1.AutoSize = true;

            this.label1.Location = new System.Drawing.Point(27, 43);

            this.label1.Name = "Color1";

            this.label1.Size = new System.Drawing.Size(35, 13);

            this.label1.TabIndex = 1;

            this.label1.Text = "Rojo";

            // 

            // label2

            // 

            this.label2.AutoSize = true;

            this.label2.Location = new System.Drawing.Point(30, 85);

            this.label2.Name = "label2";

            this.label2.Size = new System.Drawing.Size(35, 13);

            this.label2.TabIndex = 2;

            this.label2.Text = "Verde";

            // 

            // label3

            // 

            this.label3.AutoSize = true;

            this.label3.Location = new System.Drawing.Point(30, 122);

            this.label3.Name = "label3";

            this.label3.Size = new System.Drawing.Size(35, 13);

            this.label3.TabIndex = 3;

            this.label3.Text = "Azul";

            // 

            // comboBox1

            // 

            this.comboBox1.FormattingEnabled = true;

            this.comboBox1.Location = new System.Drawing.Point(105, 43);

            this.comboBox1.Name = "comboBox1";

            this.comboBox1.Size = new System.Drawing.Size(121, 21);

            this.comboBox1.TabIndex = 4;

            this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged);

            // 

            // comboBox2

            // 

            this.comboBox2.FormattingEnabled = true;

            this.comboBox2.Location = new System.Drawing.Point(105, 85);

            this.comboBox2.Name = "comboBox2";

            this.comboBox2.Size = new System.Drawing.Size(121, 21);

            this.comboBox2.TabIndex = 5;

            // 

            // comboBox3

            // 

            this.comboBox3.FormattingEnabled = true;

            this.comboBox3.Location = new System.Drawing.Point(105, 122);

            this.comboBox3.Name = "comboBox3";

            this.comboBox3.Size = new System.Drawing.Size(121, 21);

            this.comboBox3.TabIndex = 6;

            // 

            // Form1

            // 

            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);

            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

            this.ClientSize = new System.Drawing.Size(292, 273);

            this.Controls.Add(this.comboBox3);

            this.Controls.Add(this.comboBox2);

            this.Controls.Add(this.comboBox1);

            this.Controls.Add(this.label3);

            this.Controls.Add(this.label2);

            this.Controls.Add(this.label1);

            this.Controls.Add(this.button1);

            this.Name = "Form1";

            this.Text = "Form1";

            this.ResumeLayout(false);

            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button button1;

        private System.Windows.Forms.Label label1;

        private System.Windows.Forms.Label label2;

        private System.Windows.Forms.Label label3;

        private System.Windows.Forms.ComboBox comboBox1;

        private System.Windows.Forms.ComboBox comboBox2;

        private System.Windows.Forms.ComboBox comboBox3;

    }

}

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)

        {

           Text = comboBox1.Text;

        }

        private void Form1_load(object sender, EventArgs e)

        {

            for (int f = 0; f < 255; f++)

            {

                comboBox1.Items.Add(f.ToString());

                comboBox2.Items.Add(f.ToString());

                comboBox3.Items.Add(f.ToString());

            }

            comboBox1.SelectedIndex = 0;

            comboBox2.SelectedIndex = 0;

            comboBox3.SelectedIndex = 0;

        }

        private void button1_Click(object sender, EventArgs e)

        {

            int rojo = int.Parse(comboBox1.Text);

            int verde = int.Parse(comboBox2.Text);

            int azul = int.Parse(comboBox3.Text);

            BackColor = Color.FromArgb(rojo, verde, azul);

        }

    }

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Windows.Forms;

namespace WindowsFormsApplication1

{

    static class Program

    {

        /// <summary>

        /// The main entry point for the application.

        /// </summary>

        [STAThread]

        static void Main()

        {

            Application.EnableVisualStyles();

            Application.SetCompatibleTextRenderingDefault(false);

            Application.Run(new Form1());

        }

    }

}

public Form1()

{

    InitializeComponent();

    this.Load += new System.EventHandler(this.Form1_Load);

}

1º ARCHIVO

namespace WindowsFormsApplication1

{

    partial class Form1

    {

        /// <summary>

        /// Required designer variable.

        /// </summary>

        private System.ComponentModel.IContainer components = null;

        /// <summary>

        /// Clean up any resources being used.

        /// </summary>

        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>

        protected override void Dispose(bool disposing)

        {

            if (disposing && (components != null))

            {

                components.Dispose();

            }

            base.Dispose(disposing);

        }

        #region Windows Form Designer generated code

button1.Click+= new System.EventHandler(button1_Click);