This exception is a subclass of ArgumentException and indicates that a null parameter value was received by a method that does not accept nulls. public class ArgumentNullException : ArgumentException { // Public Constructors public ArgumentNullException ( ); public ArgumentNullException (string paramName ); public ArgumentNullException (string paramName , string message ); // Protected Constructors protected ArgumentNullException (System.Runtime.Serialization.SerializationInfo info , System.Runtime.Serialization.StreamingContext context ); } HierarchyObject Exception(System.Runtime.Serialization.ISerializable) SystemException ArgumentException ArgumentNullException |