protected override void Execute(CodeActivityContext context)
        {
            var firstString  = FirstString.Get(context);
            var secondString = SecondString.Get(context);

            var result = ConcatString(firstString, secondString);

            Result.Set(context, result);
        }
 protected override void Execute(CodeActivityContext context)
 {
     // Combine the strings then set the output
     CombinedString.Set(context, FirstString.Get <String>(context) + SecondString.Get <String>(context));
 }