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NullReferenceException Class

[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]

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

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

[SerializableAttribute]
public ref class NullReferenceException : public SystemException

The NullReferenceException type exposes the following members.

  NameDescription
Public methodNullReferenceException()()()()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.
Public methodNullReferenceException(String)Initializes a new instance of the NullReferenceException class with a specified error message.
Public methodNullReferenceException(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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  NameDescription
Public propertyInnerExceptionGets the Exception instance that caused the current exception. (Inherited from Exception.)
Public propertyMessageGets a message that describes the current exception. (Inherited from Exception.)
Public propertyStackTraceGets a string representation of the immediate frames on the call stack. (Inherited from Exception.)
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  NameDescription
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringCreates and returns a string representation of the current exception. (Inherited from Exception.)
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  NameDescription
Protected fieldm_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.
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