Unless a class is system-generated and system-required, you can change its name by using its property sheet. The new class name must be unique within the object store and must be no longer than 64 characters long.
When you rename a class, you change the value of the Display Name property, which causes the value of the Name property to also be updated. However, changing the value of the Display Name property does not automatically change the value of the Symbolic Name property, which must be unique within the object store. For more information, see Name properties.
To rename a class