ValidationKey - конструктор

public ValidationKey(
	Guid id,
	string name,
	string message = null,
	Func<ValidationKey, CultureInfo, string> messageFunc = null
)

Public Sub New ( 
	id As Guid,
	name As String,
	Optional message As String = Nothing,
	Optional messageFunc As Func(Of ValidationKey, CultureInfo, String) = Nothing
)

public:
ValidationKey(
	Guid id, 
	String^ name, 
	String^ message = nullptr, 
	Func<ValidationKey^, CultureInfo^, String^>^ messageFunc = nullptr
)

new : 
        id : Guid * 
        name : string * 
        ?message : string * 
        ?messageFunc : Func<ValidationKey, CultureInfo, string> 
(* Defaults:
        let _message = defaultArg message null
        let _messageFunc = defaultArg messageFunc null
*)
-> ValidationKey