Best Practices when Writing Dynamics CRM Plugins

• For improved performance, Microsoft Dynamics 365 caches plug-in instances. The plug-in’s Execute method should be written to be stateless because the constructor is not called for every invocation of the plug-in. Also, multiple system threads could execute the plug-in at the same time. All per invocation state information is stored in the context, so you should not use global variables or attempt to store any data in member variables for use during the next plug-in invocation unless that data was obtained from the configuration parameter provided to the constructor. Changes to a plug-ins registration will cause the plug-in to be re-initialized.

• Its a best practice to check for the target entity name and message name at the beginning of the plugin execute message to avoid running the plugin unintentionally.

• When you want to update fields on a record, it’s good practice to create a new entity or early bound type of the record and only add the fields you want to update. By only updating the fields you are changing you reduce triggering other plugins running needlessly.

• When retrieving an entity using SDK, make sure you are instantiating a new object (not just assigning a reference) and assigning it to the returned object from the retrieve SDK message for better performance.

• Do not update the retrieve Target entity because it will update all fields included in the target entity.

• The common method to avoid a recurring plugin is to check if  a plugins depth > 1.  This would stop the plugin from being run if was triggered from any other plugin.  The plugin would only run if triggered from the CRM form. This can resolve the problem of plugins firing more than once but it stops plugins being triggered from other plugins, this might not be the functionality you require.


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