Initializes a new instance of the NullReferenceException class, setting the Exception.Message property of the new instance to a system-supplied message that describes the error, such as "The value 'null' was found where an instance of an object was required." This message takes into account the current system culture.

Initializes a new instance of the NullReferenceException class with a specified error message.

Initializes a new instance of the NullReferenceException class with a specified error message and a reference to the inner exception that is the cause of this exception.

Initializes a new instance of the NullReferenceException class with serialized data.