MessageDialog missing in C# WPF

Question

I am new in WPF C#.

I want to use a MessageDialog, but I can't instantiate it because I can't find its namespace reference.

Please note that I can use a MessageBox.

I take a screenshot here:

What should I look to solve the problem?

Update I tried to use a ModalWindow as suggested by some user who deleted his answer, but I have the same problem.

WPF and WinForms are different, you shouldn't be using stuff from the System.Windows.Forms namespace (and not even reference the library). WPF has its own MessageBox — Camilo Terevinto
– Camilo Terevinto, Commented Apr 12, 2018 at 10:35
Also, not sure what MessageDialog is supposed to be, but it's not part of the .NET Framework. Do you mean the UWP MessageDialog class? — Camilo Terevinto
– Camilo Terevinto, Commented Apr 12, 2018 at 10:37
As was said in another palce, MessageDialog is from UWP. Wich while Similar to WPF, has a totally different target Framework. The closest equivalent to the WindowsForms MessageBox in WPF is MessageBox (msdn.microsoft.com/en-us/library/ms602949.aspx) — Christopher
– Christopher, Commented Apr 12, 2018 at 10:41

Camilo Terevinto · Accepted Answer · 2018-04-12 10:42:09Z

1

MessageDialog is a UWP class, so it is only available to Windows 10 Store applications. As far as I know it does not exist in WPF.
The namespace is Windows.UI.Popups.

edited Apr 12, 2018 at 10:42

Camilo Terevinto

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answered Apr 12, 2018 at 10:39

CFreitas

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5 Comments

Camilo Terevinto Over a year ago

You are correct, it's not part of WPF, it's only available to UWP apps. Not sure why the OP is looking for that in WinForms

shogitai Over a year ago

OK thanks. It was what I needed to understand. However, there was no need to downvote the question, I worked to try to be clear and understandable.

Christopher Over a year ago

@kitsune: Nobody had any idea what "MessageBox" even is. Nor why you looked for it in the Windows.Forms Namespace.

Christopher Over a year ago

@kitsune: You had a book-example of a XY Problem (meta.stackexchange.com/questions/66377/what-is-the-xy-problem) You had a problem X (Designs were not respected). Convinced yourself Y (MessageDialog) was the only solution. And thus never explained X

tolache Over a year ago

If Windows.IU.Popups namespace is only there for UWP, how do I use something like this in WPF?

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