You can still use action binding in a script without code.
In the designer, select activity2 and in the property grid use the ... button on the target property. This opens the Bind Property dialog box in the Activity Property dialog box. Go to Activity1 and select the source property from it.
, , XOML: -
<ns0:Activity2 SomeProperty="{ActivityBind Activity1, Path=SomeOtherProperty}" ..>