从4.0 .NET Framework从字符串到整数错误的转换

Question

I have an issue regarding the .NET Framework when I tried to change the .NET Framework to 4.0 to 3.5. The code works perfectly in 4.0 but when I tried to change it to 3.5 it gives me an error Conversion from string to integer . So how to fix this one? Below is my code:

  Dim counter As Integer
  ts = TargetDT.Subtract(DateTime.Now)

  If ts.TotalMilliseconds > 0 Then
  Me.timer.Text = ts.ToString("mm\:ss") 'I get the error from here
  ElseIf ts.TotalMilliseconds < 0 Then

  Timer1.Interval = 500
  CountDownFrom = TimeSpan.FromMinutes(0.5)
  TargetDT = DateTime.Now.Add(CountDownFrom)
  Me.timer.Text = ts.ToString("mm\:ss")

  If Me.timer.Text = "00:00" Then

  counter = counter + 1
  If counter = 1 Then
  saban()
  End If

  End If

 End If

Answer 1

Remove the backslash from this line:

Me.timer.Text = ts.ToString("mm\:ss")

to make it

Me.timer.Text = ts.ToString("mm:ss")