INI file read (C #)

Read the INI file;
private String GetPrivateProfileString (string applicationname, String keyname,string Default, String FileName)
{
string[] Iniitems = new String[0];
String Inilines;
String Iniline;
int I, J;
Try
{
Read the INI file;
System.IO.StreamReader iniFile = new System.IO.StreamReader (FileName, System.Text.Encoding.Default);
Inilines = Inifile.readtoend ();
Inifile.close ();
}
Catch
{
return Default;
}
Split by carriage return to get each row
Iniitems = Inilines.split (");
Traverse each row
for (i = 0; i < iniitems.getlength (0); i++)
{
Matching value found
if (iniitems[i). Trim (). ToUpper () = = ' [' + Applicationname.trim (). ToUpper () + '] ')
{
Start the search from the next line
for (j = i + 1; j < iniitems.getlength (0); j + +)
{
Iniline = Iniitems[j]. Trim ();
if (Iniline.length > 0)
{
If another segment is found, the paragraph is over and the default value is returned
if (iniline[0] = = ' [' && iniline[iniline.length-1] = = '] return Default;
}
Remove all spaces
Iniline = Iniitems[j]. TrimStart (). Replace ("", "");
if (iniline.substring (0, Math.min (keyname.length + 1, iniline.length)). ToUpper () = = Keyname.toupper () + "=")
{
If a key match is found
Return INIITEMS[J]. Substring (Iniitems[j]. IndexOf (' = ') + 1);
}
}
return Default; The key match is not found, the default value is returned
}
}
return Default; Return default values
}