C#位移运算

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

        private void btn_Get_Click(object sender, EventArgs e)
        {
            try
            {
                char chr = txt_chr.Text[0];//获得一个汉字字符
                byte[] gb2312_bt = //使用gb2312编码方式获得字节序列
                    Encoding.GetEncoding("gb2312").GetBytes(new Char[] { chr });
                int n = (int)gb2312_bt[0] << 8;//将字节序列的第一个字节向左移8位
                n += (int)gb2312_bt[1];//第一个字节移8位后与第二个字节相加得到汉字编码
                txt_Num.Text = n.ToString();//显示汉字编码
            }
            catch (Exception)
            {
                MessageBox.Show(//异常提示信息
                    "请输入汉字字符！", "出现错误！");
            }
        }

以下是design.cs

namespace GetCode
{
    partial class Form1
    {
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows 窗体设计器生成的代码

        /// <summary>
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.txt_Num = new System.Windows.Forms.TextBox();
            this.label1 = new System.Windows.Forms.Label();
            this.txt_chr = new System.Windows.Forms.TextBox();
            this.btn_Get = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // txt_Num
            // 
            this.txt_Num.Location = new System.Drawing.Point(146, 52);
            this.txt_Num.Name = "txt_Num";
            this.txt_Num.Size = new System.Drawing.Size(100, 21);
            this.txt_Num.TabIndex = 7;
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(24, 19);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(113, 12);
            this.label1.TabIndex = 6;
            this.label1.Text = "输入一个汉字字符：";
            // 
            // txt_chr
            // 
            this.txt_chr.Location = new System.Drawing.Point(146, 14);
            this.txt_chr.Name = "txt_chr";
            this.txt_chr.Size = new System.Drawing.Size(100, 21);
            this.txt_chr.TabIndex = 5;
            // 
            // btn_Get
            // 
            this.btn_Get.Location = new System.Drawing.Point(26, 50);
            this.btn_Get.Name = "btn_Get";
            this.btn_Get.Size = new System.Drawing.Size(100, 23);
            this.btn_Get.TabIndex = 4;
            this.btn_Get.Text = "获取汉字编码值";
            this.btn_Get.UseVisualStyleBackColor = true;
            this.btn_Get.Click += new System.EventHandler(this.btn_Get_Click);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(269, 89);
            this.Controls.Add(this.txt_Num);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.txt_chr);
            this.Controls.Add(this.btn_Get);
            this.Name = "Form1";
            this.Text = "获取汉字编码值";
            this.Load += new System.EventHandler(this.Form1_Load);
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.TextBox txt_Num;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.TextBox txt_chr;
        private System.Windows.Forms.Button btn_Get;
    }
}