AesCryptography 构造函数

public AesCryptography(
	string key,
	CipherMode mode = CipherMode.ECB
)

Public Sub New ( 
	key As String,
	Optional mode As CipherMode = CipherMode.ECB
)

public:
AesCryptography(
	String^ key, 
	CipherMode mode = CipherMode::ECB
)

new : 
        key : string * 
        ?mode : CipherMode 
(* Defaults:
        let _mode = defaultArg mode CipherMode.ECB
*)
-> AesCryptography