Form trong lập trình C# Winform

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 WindowGUI
{
    public partial class fMain : Form
    {
        public fMain()
        {
            InitializeComponent();                  
        }
        int i = 0;
        private void fMain_Click(object sender, EventArgs e)
        {
            MessageBox.Show("Bạn đã click lên form " + i + " lần");
            i++;
        }
    }
}
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namespace WindowGUI
{
    partial class fMain
    {
        /// <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()
        {
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(fMain));
            this.button1 = new System.Windows.Forms.Button();
            this.button2 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // button1
            // 
            this.button1.Font = new System.Drawing.Font("Mistral", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.button1.Location = new System.Drawing.Point(436, 60);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(87, 23);
            this.button1.TabIndex = 0;
            this.button1.Text = "button1";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.UseWaitCursor = true;
            // 
            // button2
            // 
            this.button2.Location = new System.Drawing.Point(199, 59);
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size(75, 23);
            this.button2.TabIndex = 1;
            this.button2.Text = "button2";
            this.button2.UseVisualStyleBackColor = true;
            this.button2.UseWaitCursor = true;
            // 
            // fMain
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.BackColor = System.Drawing.SystemColors.Control;
            this.BackgroundImage = global::WindowGUI.Properties.Resources.Kteam_vector_copy_2;
            this.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Zoom;
            this.ClientSize = new System.Drawing.Size(885, 487);
            this.Controls.Add(this.button2);
            this.Controls.Add(this.button1);
            this.Cursor = System.Windows.Forms.Cursors.WaitCursor;
            this.DoubleBuffered = true;
            this.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, ((System.Drawing.FontStyle)((System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic))), System.Drawing.GraphicsUnit.Point, ((byte)(163)));
            this.ForeColor = System.Drawing.SystemColors.MenuHighlight;
            this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
            this.Name = "fMain";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
            this.Text = "HowKteam.com";
            this.TransparencyKey = System.Drawing.Color.Yellow;
            this.UseWaitCursor = true;
            this.WindowState = System.Windows.Forms.FormWindowState.Maximized;
            this.Click += new System.EventHandler(this.fMain_Click);
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.Button button2;

    }
}

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