blanks after , in set no longer allowed...

        public string CalculateBindingsString(params Tuple<string, string>[] vars)
        {
            string result = string.Empty;

            if (vars != null)
            {
                foreach (var v in vars)
                {
                    var name = v.Item1;
                    var value = v.Item2;

                    if (ValidateVariableName(name))
                    {
                        if (result.Any())
                            result += ", ";
                        result += name + "=" + value;
                    }
                }
            }

            return result;
        }