C＃如何操作DBF文件？

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO; 
using System.Text; 
namespace PDFGenerator
{
    /// <summary>
    /// Form1 的摘要说明。
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.Container components = null;        public Form1()
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();            //
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            //
        }        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (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.components = new System.ComponentModel.Container();
            this.Size = new System.Drawing.Size(300,300);
            this.Text = "Form1";
        }
        #endregion
        static float pageWidth = 594.0f; 
        static float pageDepth = 828.0f; 
        static float pageMargin = 30.0f; 
        static float fontSize = 20.0f; 
        static float leadSize = 10.0f; 
        static StreamWriter pPDF=new StreamWriter("E:\\myPDF.pdf");         static MemoryStream mPDF= new MemoryStream();         static void ConvertToByteAndAddtoStream(string strMsg) 
        { 
            Byte[] buffer=null; 
            buffer=ASCIIEncoding.ASCII.GetBytes(strMsg); 
            mPDF.Write(buffer,0,buffer.Length); 
            buffer=null; 
        }         static string xRefFormatting(long xValue) 
        { 
            string strMsg =xValue.ToString(); 
            int iLen=strMsg.Length; 
            if (iLen<10) 
            { 
                StringBuilder s=new StringBuilder(); 
                int i=10-iLen; 
                s.Append('0',i); 
                strMsg=s.ToString() + strMsg; 
            } 
            return strMsg; 
        }         static void Main(string[] args) 
        { 
            ArrayList xRefs=new ArrayList(); 
            //Byte[] buffer=null; 
            float yPos =0f; 
            long streamStart=0; 
            long streamEnd=0; 
            long streamLen =0; 
            string strPDFMessage=null; 
            //PDF文档头信息 
            strPDFMessage="%PDF-1.1\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage);             xRefs.Add(mPDF.Length); 
            strPDFMessage="1 0 obj\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage); 
            strPDFMessage="<< /Length 2 0 R >>\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage); 
            strPDFMessage="stream\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage); 
            ////////PDF文档描述 
            streamStart=mPDF.Length; 
            //字体 
            strPDFMessage="BT\n/F0 " + fontSize +" Tf\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage); 
            //PDF文档实体高度 
            yPos = pageDepth - pageMargin; 
            strPDFMessage=pageMargin + " " + yPos +" Td\n" ; 
            ConvertToByteAndAddtoStream(strPDFMessage); 
            strPDFMessage= leadSize+" TL\n" ; 
            ConvertToByteAndAddtoStream(strPDFMessage);             //实体内容 
            strPDFMessage= "(http://www.wenhui.org)Tj\n" ; 
            ConvertToByteAndAddtoStream(strPDFMessage); 
            strPDFMessage= "ET\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage); 
            streamEnd=mPDF.Length;             streamLen=streamEnd-streamStart; 
            strPDFMessage= "endstream\nendobj\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage); 
            //PDF文档的版本信息 
            xRefs.Add(mPDF.Length); 
            strPDFMessage="2 0 obj\n"+ streamLen + "\nendobj\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage);             xRefs.Add(mPDF.Length); 
            strPDFMessage="3 0 obj\n<</Type/Page/Parent 4 0 R/Contents 1 0 R>>\nendobj\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage);             xRefs.Add(mPDF.Length); 
            strPDFMessage="4 0 obj\n<</Type /Pages /Count 1\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage); 
            strPDFMessage="/Kids[\n3 0 R\n]\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage); 
            strPDFMessage="/Resources<</ProcSet[/PDF/Text]/Font<</F0 5 0 R>> >>\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage); 
            strPDFMessage="/MediaBox [ 0 0 "+ pageWidth + " " + pageDepth + " ]\n>>\nendobj\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage);             xRefs.Add(mPDF.Length); 
            strPDFMessage="5 0 obj\n<</Type/Font/Subtype/Type1/BaseFont/Courier/Encoding/WinAnsiEncoding>>\nendobj\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage);             xRefs.Add(mPDF.Length); 
            strPDFMessage="6 0 obj\n<</Type/Catalog/Pages 4 0 R>>\nendobj\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage);             streamStart=mPDF.Length; 
            strPDFMessage="xref\n0 7\n0000000000 65535 f \n"; 
            for(int i=0;i<xRefs.Count;i++) 
            { 
                strPDFMessage+=xRefFormatting((long) xRefs[i])+" 00000 n \n"; 
            } 
            ConvertToByteAndAddtoStream(strPDFMessage); 
            strPDFMessage="trailer\n<<\n/Size "+ (xRefs.Count+1)+"\n/Root 6 0 R\n>>\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage);             strPDFMessage="startxref\n" + streamStart+"\n%%EOF\n"; 
            ConvertToByteAndAddtoStream(strPDFMessage); 
            mPDF.WriteTo(pPDF.BaseStream);             mPDF.Close(); 
            pPDF.Close(); 
        }
    }//form