The .NET method Path.GetExtension() returns everything after the last period, plus the period.
Given the filename: config.xml.txt, it will return .txt.
The code below provides a simple wrapper around Path.GetExtension() that returns all parts of the file extension.
Given the filename: config.xml.txt, it will return .xml.txt.
The code:
using System;
using System.IO;
namespace Zuga.net
{
class Program
{
static void Main(string[] args)
{
var path = "config.xml.txt";
var ext = GetExtension(path);
Console.WriteLine(ext);
}
private static string GetExtension(string path)
{
var ret = "";
for (; ; )
{
var ext = Path.GetExtension(path);
if (String.IsNullOrEmpty(ext))
break;
path = path.Substring(0, path.Length - ext.Length);
ret = ext + ret;
}
return ret;
}
}
}Program output:
.xml.txt