PathHelper.cs

using System.Globalization;

public static class PathHelper {
    static CultureInfo cultureInfo = new CultureInfo("en-US");

    public static bool EndsWith(string path, string endsWith, bool ignoreCase) {
        if (path == "")
            return false;

        if (path.EndsWith(endsWith, ignoreCase, cultureInfo))
            return true;
        else if (path.EndsWith(endsWith + Path.DirectorySeparatorChar, ignoreCase, cultureInfo))
            return true;
        else if (path.EndsWith(endsWith + '\\', ignoreCase, cultureInfo))
            return true;

        return false;
    }

    public static bool GetSpritesFolder(string path, out string outPath, bool onlyResources = false) {
        if (path == "") {
            outPath = "";
            return false;
        }

        while (true) {
            System.IO.DirectoryInfo? parent = Directory.GetParent(path);
            if (parent == null) {
                outPath = "";
                return false;
            }

            path = parent.FullName;

            if (EndsInRootPath(path, onlyResources)) {
                outPath = path;
                return true;
            }
        }
    }

    public static bool EndsInRootPath(string path, bool onlyResources = false) {
        if (!onlyResources && EndsWith(path, "Sprites", true)) {
            return true;
        }

        return EndsWith(path, "Resources", true);
    }
}