public virtual string SubstringData(
	int offset,
	int count
)

Public Overridable Function SubstringData ( 
	offset As Integer,
	count As Integer
) As String

public:
virtual String^ SubstringData(
	int offset, 
	int count
)

abstract SubstringData : 
        offset : int * 
        count : int -> string 
override SubstringData : 
        offset : int * 
        count : int -> string