UndefinedLogicalNodeClassUndefinedLogicalNode field

Static instance for an undefined LogicalNode. Replaces null to avoid the miserable null warnings when using LogicalNodes which it is ensured that at the time of use they are not are not equal to zero, but are not yet instantiated in the constructor in a meaningful way. could be realised. For any subsequent null queries, null must be replaced by this instance. It can then be checked for 'is IUndefinedElement' if necessary.

public static readonly UndefinedLogicalNodeClass UndefinedLogicalNode

Public Shared ReadOnly UndefinedLogicalNode As UndefinedLogicalNodeClass

public:
static initonly UndefinedLogicalNodeClass^ UndefinedLogicalNode

static val UndefinedLogicalNode: UndefinedLogicalNodeClass