public bool CheckExistence(
	int row,
	int column
)

Public Function CheckExistence ( 
	row As Integer,
	column As Integer
) As Boolean

public:
virtual bool CheckExistence(
	int row, 
	int column
) sealed

abstract CheckExistence : 
        row : int * 
        column : int -> bool 
override CheckExistence : 
        row : int * 
        column : int -> bool