Base classes for use with plugins and custom workflows.

Keeps things stateless, as recommended and has helper methods to keep new, untested code at a minimum.

When implementing a Dynamics 365 plugin, copy/paste the PluginBase.cs base class, and then override the abstract Execute method. An example might look like:

public class MyTestPlugin : PluginBase
{
    public override void Execute(PluginWorker worker)
    {
        //Do plugin things here
    }
}

The PluginWorker class will provide instances of all common plugin objects.

A common requirement is to check the plugin message, event, stage and depth. This can be achieved by calling VerifyRegistration on the PluginWorker instance. For example, the following verifies the current execution is either the create or update of an Account record, running on the post event stage.

public class MyTestPlugin : XRT.Dynamics365.Templates.PluginBase
{
    public override void Execute(PluginWorker worker)
    {
        worker.VerifyRegistration("MyTestPlugin", new List<PluginStepRegistration>
        {
            new PluginStepRegistration { EntityName = "Account", MaximumDepth = 1, Message = "Create", PluginStage = (int)PluginStage.Post},
            new PluginStepRegistration { EntityName = "Account", MaximumDepth = 1, Message = "Update", PluginStage = (int)PluginStage.Post}
        });
    }
}

Passing a null collection will pass for all combinations (no verification).

PluginWorker exposes the IPluginExecutionContext instance for the plugin but for convenience contains Entity and EntityReference properties (Target and TargetReference). The PluginWorker constructor will populate these based on the plugin event and message. Similar helper properties are set for Assign and SetState plugins (although SetState is now deprecated and you should be using an Update message).