In a Microsoft Dynamics CRM on-premises environment, you are creating a custom XAML workflow library in a XAML workflow project by using Microsoft Visual Studio. You add a new XAML workflow activity…

In a Microsoft Dynamics CRM on-premises environment, you are creating a custom XAML workflow library in a XAML workflow project by using Microsoft Visual Studio. You add a new XAML workflow activity item to the project and specify a name for the process you are creating. Which reference item should you add to the XAML workflow library in order for it to compile successfully?