سلام من میخوام یه فایل رو باز کنم داخلش بنویسم تایید که میزنم اشکال میده

  Protected Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        Dim Fs As New FileStream("~/App_Data/siavash.txt", FileMode.Create, FileAccess.Write)
        Dim SW As New StreamWriter(Fs)
        SW.WriteLine(TextBox1.Text)
        SW.Close()
    End Sub  

Could not find a part of the path 'C:\Program Files\IIS Express\~\App_Data\siavash.txt'.