@DIV
using System;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace Sample_01
{
	static class Program {
		/// <summary>
		/// アプリケーションのメイン エントリ ポイントです。
		/// </summary>
		[STAThread]
		static void Main()
		{
			Application.EnableVisualStyles();
			Application.SetCompatibleTextRenderingDefault(false);
			Application.Run(new Form1());
		}
	}

	public partial class Form1 : Form
	{
		public Form1()
		{
			InitializeComponent();
		}

		private void button1_Click(object sender, EventArgs e)
		{

			Stream myStream;
			OpenFileDialog dlg = new OpenFileDialog();

			String[] arg = Environment.GetCommandLineArgs();

			String delimStr = @"\";
			Char[] delimiter = delimStr.ToCharArray();
			String[] aData = arg[0].Split(delimiter);
			String pgDir = String.Join(@"\", aData, 0, aData.Length - 1);

			dlg.InitialDirectory = pgDir;
			dlg.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
			dlg.FilterIndex = 2;
			dlg.RestoreDirectory = true;

			String str = "";

			if ( dlg.ShowDialog() == DialogResult.OK ) {
				myStream = dlg.OpenFile();
				if (myStream != null) {

					StreamReader sr = new StreamReader( 
							myStream, 
							Encoding.GetEncoding("Shift_JIS")
						);

					while ( sr.Peek() >= 0 ) {
						str += sr.ReadLine() + "\r\n";
					}

					textBox1.Text = str;

					sr.Close();
					myStream.Close();
				}

			}
		}
	}
}
@END


[[Form1.Designer.cs]]
@DIV
namespace Sample_01
{
    partial class Form1
    {
        /// <summary>
        /// 必要なデザイナ変数です。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// 使用中のリソースをすべてクリーンアップします。
        /// </summary>
        /// <param name="disposing">マネージ リソースが破棄される場合 true、破棄されない場合は false です。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows フォーム デザイナで生成されたコード

        /// <summary>
        /// デザイナ サポートに必要なメソッドです。このメソッドの内容を
        /// コード エディタで変更しないでください。
        /// </summary>
        private void InitializeComponent()
        {
            this.button1 = new System.Windows.Forms.Button();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.SuspendLayout();
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(56, 28);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(180, 35);
            this.button1.TabIndex = 0;
            this.button1.Text = "button1";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(57, 97);
            this.textBox1.Multiline = true;
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(551, 317);
            this.textBox1.TabIndex = 1;
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(665, 457);
            this.Controls.Add(this.textBox1);
            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.TextBox textBox1;
    }
}
@END