PathCombine

PathCombine.cs

using System;
using System.Collections.Generic;
using System.IO;

public static class PathCombine
{
    public static string Combine(params string[] subPath)
    {
        if (null == subPath || 0 == subPath.Length)
        {
            return "";
        }
        string finalPath = subPath[0];
        for (int i = 1; i < subPath.Length; i++)
        {
            finalPath = Path.Combine(finalPath, subPath[i]);
        }
        finalPath = finalPath.Replace("\\", "/");
        return finalPath;
    }

    public static string PureCombine(params string[] subPath)
    {
        if (null == subPath || 0 == subPath.Length)
        {
            return "";
        }
        string originalPath = Combine(subPath);
        var partPaths = originalPath.Split('/');
        List<string> partPathList = new List<string>();
        for (int i = 0; i < partPaths.Length; i++)
        {
            if (".." != partPaths[i])
            {
                partPathList.Add(partPaths[i]);
            }
            else
            {
                if (partPathList.Count - 1 < 0)
                {
                    throw new Exception("Stack Overflow");
                }
                partPathList.RemoveAt(partPathList.Count - 1);
            }
        }
        string finalPath = partPathList[0];
        for (int i = 1; i < partPathList.Count; i++)
        {
            finalPath += "/" + partPathList[i];
        }
        return finalPath;
    }
}