You could use Windows API to read structured INI file
Private Declare Ansi Function GetPrivateProfileString Lib "kernel32.dll" Alias "GetPrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpDefault As String, ByVal lpReturnedString As StringBuilder, ByVal nSize As Integer, ByVal lpFileName As String) As Integer
Your file must structured like this:
[SECTION1]
2036=kl
[SECTION2]
2000=ss
And then use:
Public Const MAX_ENTRY As Integer = 32768
[...]
Dim sSection as string = "SECTION1"
Dim sParameteras string = "2036"
Dim sDefVal as string = ""
Dim sb As New StringBuilder(MAX_ENTRY)
Dim iRet As Integer = GetPrivateProfileString(sSection, sParameter, sDefVal, sb, MAX_ENTRY, sFile)
Debug.print (sb.ToString())
The code is in VB but you could do in c# on same way