vb.net 代码发生错误返回第一行怎么写？

前两句发生错误就停止执行，什么都不处理，不弹窗口，，

该怎么写？

try
你的代码
catch
exit sub
end try

可以用Try
无视错误用 On error resume next

try
catch
finally

Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick

    Try
        Dim count As Integer

        count = ""


    Catch ex As Exception
        RemoveHandler Me.Timer1.Tick, AddressOf Timer1_Tick

    End Try

End Sub