private static string GetValue(MemberExpression node)
        {
            object val = string.Empty;

            if (node.Member is PropertyInfo)
            {
                val = GetPropertyInfoValue(node);
            }

            if (node.Member is FieldInfo)
            {
                val = GetFieldInfoValue(node);
            }

            var quotify = new QuotifyValues();
            return quotify.Quotify(val);
        }
 public string Visit(StringBuilder state, ConstantExpression expression)
 {
     var values = new QuotifyValues();
     return GetRightHandValue(state, i => expression.Value == null ? "null" : values.Quotify(expression.Value));
 }