ArgumentNullException Class
The exception that is thrown when a null reference is passed to a method that does not accept it as a valid argument.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
[SerializableAttribute]
public class ArgumentNullException : ArgumentException
Available in the .NET Micro Framework versions 2.0, 2.5, 3.0, 4.0, and 4.1.