How to check if one path is a child of another path?

Question

How to check if one path is a child of another path?
Just checking for substring is not a way to go, because there can items such as . and .., etc

Answer 1

I've used an extension method like this:

    /// <summary>
    /// Check if a directory is the base of another
    /// </summary>
    /// <param name="root">Candidate root</param>
    /// <param name="child">Child folder</param>
    public static bool IsBaseOf(this DirectoryInfo root, DirectoryInfo child)
    {
        var directoryPath = EndsWithSeparator(new Uri(child.FullName).AbsolutePath);
        var rootPath = EndsWithSeparator(new Uri(root.FullName).AbsolutePath);
        return directoryPath.StartsWith(rootPath, StringComparison.OrdinalIgnoreCase);
    }

    private static string EndsWithSeparator(string absolutePath)
    {
        return absolutePath?.TrimEnd('/','\\') + "/";
    }