ArgumentNullException 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 a null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

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

[SerializableAttribute]
public ref class ArgumentNullException : public ArgumentException

The ArgumentNullException type exposes the following members.

  NameDescription
Public methodArgumentNullException()()()()Initializes a new instance of the ArgumentNullException class.
Public methodArgumentNullException(String)Initializes a new instance of the ArgumentNullException class with the name of the parameter that causes this exception.
Public methodArgumentNullException(String, String)Initializes an instance of the ArgumentNullException class with a specified error message and the name of the parameter that causes this exception.
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  NameDescription
Public propertyInnerExceptionGets the Exception instance that caused the current exception. (Inherited from Exception.)
Public propertyMessageGets the error message and the parameter name, or only the error message if no parameter name is set. (Inherited from ArgumentException.)
Public propertyParamNameGets the name of the parameter that causes this exception. (Inherited from ArgumentException.)
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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ArgumentNullException is thrown when a method is invoked and at least one of the passed arguments is nullNothingnullptrunita null reference (Nothing in Visual Basic) but should never be nullNothingnullptrunita null reference (Nothing in Visual Basic).

ArgumentNullException behaves identically to ArgumentException. It is provided so that application code can differentiate between exceptions caused by null arguments and exceptions caused by arguments that are not null. For errors caused by arguments that are not null, see ArgumentOutOfRangeException.

For a list of initial property values for an instance of ArgumentNullException, see the ArgumentNullException constructors.

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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