<ObsoleteAttribute()>
ReadOnly Property Count As Integer

[ObsoleteAttribute()]
int Count {get;}

int numberOfCells = worksheet.Cells["A1:B3"].Count; // 6 cells
int numberOfRows = worksheet.Cells["A1:B3"].Rows.Count; // 3 rows
int numberOfCols = worksheet.Cells["A1:B3"].Columns.Count; // 2 columns

Dim numberOfCells As Integer = worksheet.Cells("A1:B3").Count ' 6 cells
Dim numberOfRows As Integer = worksheet.Cells("A1:B3").Rows.Count ' 3 rows
Dim numberOfCols As Integer = worksheet.Cells("A1:B3").Columns.Count ' 2 columns