Windows single apps run in windows phone,surface

http://blogs.windows.com/windows/b/buildingapps/archive/2014/04/02/extending-platform-commonality-through-universal-windows-apps.aspx

http://blogs.windows.com/windows/b/buildingapps/archive/2014/04/02/windows-store-universal-windows-app-opportunity.aspx


http://www.wpcentral.com/what-is-a-universal-windows-app

http://msdn.microsoft.com/en-us/library/windows/apps/dn609832.aspx


http://msdn.microsoft.com/en-us/library/dn642498.aspx

Windows Application close current window open another window.Another windows close event trigger shows parent window

  First Window code for button click
          SecondWindow rfisreport = new SecondWindow();
            rfisreport.Parent = this;
            this.Hide();
            rfisreport.Show();

Second Window Code

 public FirstWindow Parent;

 protected override void OnClosed(EventArgs e)
        {
            base.OnClosed(e);
            if(Parent!=null)              
            {
                Parent.Show();
            }
        }

Windows App Error log

  public static class ErrorLog
    {

       static string path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "log.txt"); //@"c:\RFIDLOG\log.txt";

        public static void WriteError(string error)
        {
            try
            {
                //StreamWriter sw = File.AppendText("log.txt");
                //sw.WriteLine(DateTime.Now + Environment.NewLine);
                //sw.WriteLine(error + Environment.NewLine);
                //sw.WriteLine(Environment.NewLine);
                //sw.Close();

                if (!File.Exists(path))
                {
                    // Create a file to write to.
                    using (StreamWriter sw = File.CreateText(path))
                    {
                        sw.WriteLine(DateTime.Now + Environment.NewLine);
                        sw.WriteLine(error + Environment.NewLine);
                        sw.WriteLine("---------------------------------------");

                    }
                }
                else
                {
                    using (StreamWriter sw = File.AppendText(path))
                    {
                        sw.WriteLine(DateTime.Now + Environment.NewLine);
                        sw.WriteLine(error + Environment.NewLine);
                        sw.WriteLine("---------------------------------------");

                    }
                }
            }
            catch (Exception)
            {
                //
            }
        }
    }