When running a plugin, developers may see the error:
The data contract type ‘Microsoft.Xrm.Sdk.OrganizationServiceFault’ cannot be serialized in partial trust because the property ‘ExceptionRetriable’ does not have a public getter.
One reason for this, is when you are using tracing in your plugin, you should have tracing enabled in Dynamics 365 settings.
ITracingService tracingService = (ITracingService)serviceProvider.GetService(typeof(ITracingService)); tracingService.Trace("Tracing");
In System Settings, enable: