Data Contract Cannot be Serialized Error in Dynamics 365 Plugin

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.

Code:

[sourcecode language=”CSharp”] ITracingService tracingService = (ITracingService)serviceProvider.GetService(typeof(ITracingService));
tracingService.Trace("Tracing");
[/sourcecode]

In System Settings, enable: