public override bool ValidateUser(
	string username,
	string password
)

Public Overrides Function ValidateUser ( 
	username As String,
	password As String
) As Boolean

public:
virtual bool ValidateUser(
	String^ username, 
	String^ password
) override

abstract ValidateUser : 
        username : string * 
        password : string -> bool 
override ValidateUser : 
        username : string * 
        password : string -> bool