//mxd
        public static bool CheckWritePremissions(string path)
        {
            try
            {
                DirectoryInfo di = new DirectoryInfo(path);
                DirectorySecurity ds = di.GetAccessControl();
                AuthorizationRuleCollection rules = ds.GetAccessRules(true, true, typeof(NTAccount));
                WindowsIdentity currentuser = WindowsIdentity.GetCurrent();

                if(currentuser != null)
                {
                    WindowsPrincipal principal = new WindowsPrincipal(currentuser);
                    foreach(AuthorizationRule rule in rules)
                    {
                        FileSystemAccessRule fsar = rule as FileSystemAccessRule;
                        if(fsar != null && (fsar.FileSystemRights & FileSystemRights.WriteData) > 0)
                        {
                            NTAccount account = rule.IdentityReference as NTAccount;
                            if(account != null && principal.IsInRole(account.Value)) return true;
                        }
                    }
                }
            }
            catch(UnauthorizedAccessException) { }

            return false;
        }