Is thrown by a method that is passed null.Forgotten to dimension an array before initializing it.Forgotten to instantiate a reference type. Attempting to use mClass here will result in NullReferenceExceptionĪ NullReferenceException typically reflects developer error and is thrown in the following scenarios: In order to prevent the error, objects that could be null should be tested for null before being used. The message “ object reference not set to an instance of an object” (NullReferenceException) means that you are referring to an object the does not exist or was deleted or cleaned up. A reference is what is used to describe the pointer to the memory location where the Object resides. Object reference not set to an instance of an objectĪn Object is an instance of a Class, it is stored some where in memory.
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