Cannot login to Facebook from Windows Phone

Effects:
I connected to https://m.facebook.com/login.php, using my Nokia Lumia 800 with Windows Phone 7.8, but inserting the correct credentials I cannot login: the browser refreshes the page showing the alert “You must login first.”.
I thought I had forgotten my credentials…

Cannot login to Facebook from Windows Phone

Solution:
Go to settings of Internet Explorer and place a tick on “Allow cookies on my phone” check box.

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The name ‘DisplayModes’ does not exist in the current context

The name ‘DisplayModes’ does not exist in the current context

The error above is caused from the following code:

@{
    Layout = "~/Views/Shared/_Layout.cshtml";
    DisplayModes.RequireConsistentDisplayMode = true;
}

Solution:

Replace

DisplayModes.RequireConsistentDisplayMode = true;

with

DisplayModeProvider.Instance.RequireConsistentDisplayMode = true;

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Microsoft Windows Phone – “0x89731812”

0x89731812

The above error message appears when you try to deploy a Windows Phone Project to a physical Windows Phone device.

Cause:
Connection to device failed.

Solution:
Disconnect and Reconnect the USB Cable, verify that Zune running and unlock the screen.

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SDK update for Windows Phone 7.8 – “The element “Deployment” in namespace “http://schemas.microsoft.com/windowsphone/2009/deployment” has invalid child element “AppExtra”. List of possible elements expected: “App”.”

The element “Deployment” in namespace “http://schemas.microsoft.com/windowsphone/2009/deployment” has invalid child element “AppExtra”. List of possible elements expected: “App”.

In Italian

L’elemento “Deployment” nello spazio dei nomi “http://schemas.microsoft.com/windowsphone/2009/deployment” ha un elemento figlio non valido “AppExtra”. Elenco di possibili elementi previsti: “App”.

Cause:
Installing the Windows Phone 8 SDK, the schema files of the previous version will update too. If you haven’t installed it and you want to work with Visual Studio 2010 you have an old version of schemas that not contains the <AppExtra> node, so the error appears because the xsd file cannot validate your WMAppManifest.xml file with the new lines

<?xml version="1.0" encoding="utf-8"?>
<Deployment xmlns="http://schemas.microsoft.com/windowsphone/2009/deployment" AppPlatformVersion="7.1">
  <AppExtra xmlns="" AppPlatformVersion="8.0">
    <Extra Name="Tiles"/>
  </AppExtra>

Solution:
Download and replace the following files inside you Visual Studio 2010 installation folder at the path like this:

C:\\Program Files\\Microsoft Visual Studio 10.0\\Xml\\Schemas

Rename the Microsoft.Phone.PreImport.targets file in

C:\\Program Files\\MSBuild\\Microsoft\\Silverlight for Phone\\v4.0

append “_” at the end of the filename: Microsoft.Phone.PreImport.targets_ (I’m searching other ways for this part of solution)

Close and re-open Visual Studio 2010 then Rebuild your solution.

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HOW TO create a bulleted list in Microsoft Windows Phone App

To create a bulleted list in Microsoft Windows Phone App you have the following options:

  1. Write text inside your xaml file using and elements
        <TextBlock TextWrapping="Wrap">
          New features:<LineBreak/>
          <Run>• No Ads</Run><LineBreak/>
          <Run>• Message Encryption with Password for a double protection</Run><LineBreak/>
          <Run>• Advanced settings</Run><LineBreak/>
          <Run>• and more...</Run><LineBreak/>
        </TextBlock>
        
  2. Write text inside you Resouces file (use SHIFT+RETURN to create new line)
        
          New features:
          • No Ads
          • Message Encryption with Password for a double protection
          • Advanced settings
          • and more...    
        
  3. Create a bulleted or numbered list in Blend

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HOW TO install certificates file .cer on Microsoft Windows Phone-based devices

Be sure that you have exported the certificate as DER-coded-binary X.509 (.cer).
Send the Certificate file “.cer” via e-mail to an account configured on your Microsoft Windows Phone device.
Sync the Mail Box and tap on the attachment file to install the certificate.
Reboot your device.

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Microsoft Windows Phone – “0×89731811”

When you try to deploy a Windows Phone Project to a physical Windows Phone device show you the following error message:

0×89731811

Solution 1:

Launch the Zune software and check that the phone is connected to your pc.

Solution 2:

Deploy to Windows Phone Emulator

In Visual Studio, on the Standard toolbar, click Windows Phone Emulator.
Deploy to Windows Phone Emulator

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