I am trying to access a column on the last row of my data grid but I am getting the following error - System.NullReferenceException was unhandled
Message="Object reference not set to an instance of an object."

Below I have included my vb.net code

Count = Me.DataGridView1.Rows.Count
MsgBox("70 " + Me.DataGridView1.Rows(Me.DataGridView1.Rows.Count - 1)
MsgBox("71 " + Me.DataGridView1.Rows(19).Cells.Item(4).Value.ToString) <---- This is the line generating the exception.

Thanks