NullReferenceException Class

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The exception that is thrown when there is an attempt to dereference a null object reference.

Inheritance Hierarchy

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

'Declaration
<SerializableAttribute> _
Public Class NullReferenceException _
    Inherits SystemException

[SerializableAttribute]
public class NullReferenceException : SystemException

[SerializableAttribute]
public ref class NullReferenceException : public SystemException

[<SerializableAttribute>]
type NullReferenceException =  
    class
        inherit SystemException
    end

public class NullReferenceException extends SystemException

The NullReferenceException type exposes the following members.

	Name	Description
	NullReferenceException() () () ()	Initializes a new instance of the NullReferenceException class, setting the 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.
	NullReferenceException(String)	Initializes a new instance of the NullReferenceException class with a specified error message.
	NullReferenceException(String, Exception)	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.

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	Name	Description
	InnerException	Gets the Exception instance that caused the current exception. (Inherited from Exception.)
	Message	Gets a message that describes the current exception. (Inherited from Exception.)
	StackTrace	Gets a string representation of the immediate frames on the call stack. (Inherited from Exception.)

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	Name	Description
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Creates and returns a string representation of the current exception. (Inherited from Exception.)

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	Name	Description
	m_HResult	(Inherited from Exception.)

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Note that applications throw the ArgumentNullException exception rather than the NullReferenceException exception discussed here.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.