可以通过调用kernel32.dll中的两个api：WritePrivateProfileString，GetPrivateProfileString来实现对ini 文件的读些。

具体实现的代码如下：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
using System.Text;

namespace iniprocess
{
 
 public class Form1 : System.Windows.Forms.Form
 {
  private System.Windows.Forms.TextBox textBox1;
  private System.Windows.Forms.Button button2;
  private System.Windows.Forms.Button button1;
  
  [DllImport("kernel32")]
  private static extern long WritePrivateProfileString(string section,
   string key,string val,string filePath);
  [DllImport("kernel32")]
  private static extern int GetPrivateProfileString(string section,
   string key,string def, StringBuilder retVal,
   int size,string filePath);

  public void IniWriteValue(string Section,string Key,string Value,string filepath)//对ini文件进行写操作的函数
  {
   WritePrivateProfileString(Section,Key,Value,filepath);
  }
       
  public string IniReadValue(string Section,string Key,string filepath)//对ini文件进行读操作的函数
  {
   StringBuilder temp = new StringBuilder(255);
   int i = GetPrivateProfileString(Section,Key,"",temp,
    255, filepath);
   return temp.ToString();

  }

  private void button1_Click(object sender, System.EventArgs e)
  {
   
   this.textBox1 .Text= IniReadValue("ODBC 32 bit Data Sources","MS Access Database","e:\\temp\\ODBC.INI");
  
  }

  private void button2_Click(object sender, System.EventArgs e)
  {
   
   IniWriteValue ("ODBC 32 bit Data Sources","MS Access Database",this.textBox1 .Text,"e:\\temp\\ODBC.INI");
  }
 }
}