using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Runtime.InteropServices;

namespace ReadIniTest

{

    class Class1

    {

        [DllImport("kernel32.dll")]

        static extern uint GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, StringBuilder lpReturnedString, uint nSize, string lpFileName);

        public static string GetItemValueFromIniFile(string initFileName, string groupName, string itemName)

        {

            StringBuilder strBuilder = new StringBuilder();

            uint cap=(uint)strBuilder.Capacity;

            uint uRes = GetPrivateProfileString(groupName, itemName, "default", strBuilder, cap, initFileName);

            Console.WriteLine("cap={0},uRes={1}", cap, uRes);//cap=500,uRes=499

            return strBuilder.ToString();

        }

    }

}