MessageBox.Show not working at all

Question

I am developing an app for Windows Phone 8 with C#

And I've been working alot with MessageBox.Show() , and All the time it used to show a PopUp message like i wanted , but then suddenly , it Won't show anything , I debugged the app , the code runs normally and compiles the Line MessageBox.Show("Something"); but it doesn't pop up !

I also tried to put it in another page , doesn't work too ! All i remember that yesterday I have messed with References of the Project But is that the problem ?

Anyways here's a photo of the references of my Project

Solution 1

When you build a Windows Phone Project it automatically generates all the required dependencies for you. You should be able to in your class file and add the following using statement:

using System.Windows

Once you've done that you'll be able to implement the MessageBox class. If not, then you'll need to do the following:

1. Open Solution Explorer
2. Right Click Reference Folder
3. Add Reference
4. Go to Assemblies
5. Go to Browse
6. Navigate to: C:\Windows\Microsoft.Net\Assembly\GAC_MSIL\PresentationFramework
7. Reference PresentationFramework.dll

Once you've referenced that library, you'll be able to call: MessageBox.Show(@"Something"); without a single hiccup.

Solution 2

Solved!

1.) Restarted my computer

2.) Deleted the app from the phone

3.) Debug

Comments

[GabourX]

Where i can add assemblies?

[GabourX]

Followed till step 4 , and there's was nothing to choose there Only a message was showen :All of framework assemblies are already referenced . Please use the object browser to explore the references in the Framework

[GabourX]

went to the Objcet Browser , found System.Windows and also found MessageBox class

[GabourX]

but again , The windows in your picture doesn't show any assembly in my computer

[GabourX]

2012 Express for Windows Phone

[GabourX]

I told you , its Targeting : Windows Phone 8.0

[AMS]

you cannot add framework assemblies for the windows phone 8 apps. all the framework assemblies are already referenced in windows phone 8 solutions implicitly.

[Greg]

@DreamCoder Fixed the answer to better define "steps".

[GusP]

Along these lines, I ended up just rebooting my phone and it started working again. Apparently, this is a Windows Phone 8.1 bug and not actually a problem with apps that run into this.