How do I find the correct (maybe 'absolute'?) path to my pages?

I've got my site (VS ASP .NET 4.0 C#) working on my local machine and my test server. I'm using some code that I found here:

http://stackoverflow.com/questions/7148872/asp-net-problems-with-static-selected-style-for-a-selected-page-on-the-menu

to highlight the menu tabs of my <asp:Menu> control. To find the correct path to my files I have to use two different "lengths" (using the .IndexOf and .LastIndexOf string functions) for some reason depending on if I'm looking locally for the path to my pages vs. me looking for the path on my test server. I understand why there is a difference in the paths but isn't there a way to find this path that will work no matter where I'm looking for my page(s) file path(s)?

here is the routine C# on my machine:

    protected void Page_Load(object sender, EventArgs e)
    {
        int firstIndex = 0;
        string path = "";

        if (Request.AppRelativeCurrentExecutionFilePath.ToString().Contains("/"))
        {
            firstIndex = Request.AppRelativeCurrentExecutionFilePath.ToString().IndexOf("/");
            path = Request.AppRelativeCurrentExecutionFilePath.ToString().Substring(firstIndex + 1, Request.AppRelativeCurrentExecutionFilePath.ToString().Length - 2);
        }
        else
            path = Request.AppRelativeCurrentExecutionFilePath;

        lblUserName.Text = path;
        foreach (MenuItem item in NavigationMenu.Items)
        {
            item.Selected = item.NavigateUrl.Equals(path, StringComparison.InvariantCultureIgnoreCase);
        }

        firstIndex = Page.User.Identity.Name.ToString().IndexOf("\\");
        lblUserName.Text = Page.User.Identity.Name.ToString().Substring(firstIndex + 1, Page.User.Identity.Name.ToString().Length - firstIndex - 1);
    }

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here is the routine on my test server:

    protected void Page_Load(object sender, EventArgs e)
    {
        int lastIndex = 0;
        string path = "";

        if (Request.AppRelativeCurrentExecutionFilePath.ToString().Contains("/"))
        {
            lastIndex = Request.AppRelativeCurrentExecutionFilePath.ToString().LastIndexOf("/");
            path = Request.AppRelativeCurrentExecutionFilePath.ToString().Substring(lastIndex + 1, Request.AppRelativeCurrentExecutionFilePath.ToString().Length - 7);
        }
        else
            path = Request.AppRelativeCurrentExecutionFilePath;

        foreach (MenuItem item in NavigationMenu.Items)
        {
            item.Selected = item.NavigateUrl.Equals(path, StringComparison.InvariantCultureIgnoreCase);
        }

        lastIndex = Page.User.Identity.Name.ToString().IndexOf("\\");
        lblUserName.Text = Page.User.Identity.Name;//.ToString().Substring(lastIndex + 1, Page.User.Identity.Name.ToString().Length - lastIndex - 1);
    }

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its not a lot of code, but to pin-point the issue, the code differs here:

my local code:
path = Request.AppRelativeCurrentExecutionFilePath.ToString().Substring(lastIndex + 1, Request.AppRelativeCurrentExecutionFilePath.ToString().Length - 2);

my code on the test server
path = Request.AppRelativeCurrentExecutionFilePath.ToString().Substring(lastIndex + 1, Request.AppRelativeCurrentExecutionFilePath.ToString().Length - 7);
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Michael SterlingWeb Applications DeveloperAsked:
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AndyAinscowFreelance programmer / ConsultantCommented:
http://msdn.microsoft.com/en-us/library/system.web.httprequest.applicationpath%28v=vs.110%29.aspx

You are using AppRelativeCurrentExecutionFilePath but there is also an ApplicationPath, is that what you require?
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Pravin AsarPrincipal Systems EngineerCommented:
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Michael SterlingWeb Applications DeveloperAuthor Commented:
I will try one or both of these solutions today.
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Michael SterlingWeb Applications DeveloperAuthor Commented:
Thank you.
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