Microsoft CRM Dynamics

Required Software and Assemblies To develop Windows Workflow Foundation 4 custom activities, you must develop them on Microsoft .NET Framework 4. If you plan to register your custom workflow activities with Microsoft Dynamics CRM Online, you must build them using the Microsoft .NET Framework 4  PU3  (platform update 3) or a later version, such as .NET 4.5. The following assemblies must be added as references in your project. They can be found in the  SDK\Bin  folder in Microsoft Dynamics CRM SDK. Microsoft.Xrm.Sdk.dll Microsoft.Xrm.Sdk.Workflow.dll Use the CodeActivity Workflow Base Class To create a custom workflow activity, create a class that inherits from the  CodeActivity  workflow base class. This class is available in the  System.Activities namespace. Activities that inherit from the  CodeActivity  class can override the  Execute  method to produce custom functionality. To create a custom activity that inherits from CodeActivity Start Microsoft Visual Stud