we used RadAutoCompleteBox for user to get value quickly.But here we faced the problem as if the user enter incorrect value(which is not present in the Item Source),we need to show the validation error text as the text you enter is incorrect like that. and we need this validation in the data annotation format (ex : RadMaskedTextBox for Numeric). 

Make legend item of BarSeries reflect it's visual style. For example, if I'll make a BarSeries with a border like this:
<Style TargetType="Border">
    <Setter Property="Background" Value="Transparent" />
    <Setter Property="BorderThickness" Value="1" />
    <Setter Property="BorderBrush" Value="{StaticResource chartRed}" />
</Style>

then there won't be a rectangle in a legend as expected (it will show a transparent one instead, without border).

REASON FOR DECLINATION:
The RadLegend is a standalone control which allows for customization of the legend item visuals (one can use the ItemTemplate property of the RadLegend to control the legend item's appearance or can retemplate the LegendItemControl). There is no direct link between the ChartView and the RadLegend control and the appearance of the legend elements can be done by framework means such as Style, DataTemplate and ControlTemplate. The suggested way of manipulating the look of the chart legend item is making use of the ItemTemplate property of the RadLegend and the MarkerGeometry property of the series legend settings. 

You example of the mask token are as follow
XAML

<StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">
    <TextBlock Text="Mask: A" />
    <telerik:RadMaskedTextInput Margin="0,5,0,10" Mask="AAAAAA" />
    <TextBlock Text="Mask: a" />
    <telerik:RadMaskedTextInput Margin="0,5,0,10" Mask="aaaaaa" />
    <TextBlock Text="Mask: L" />
    <telerik:RadMaskedTextInput Margin="0,5,0,10" Mask="LLLL" />
    <TextBlock Text="Mask: l" />
    <telerik:RadMaskedTextInput Margin="0,5,0,10" Mask="llll" />
    <TextBlock Text="Mask: \" />
    <telerik:RadMaskedTextInput Mask="\#\\###" />
    <TextBlock Text="Mask: Any other characters" />
    <telerik:RadMaskedTextInput Mask="N\ame: llll" />
</StackPanel>

and the result should be as follow
Mask A = Aa1 +;
Mask a = Ab-,"

which is fine.
But if I use any of the capital A or L, in the MVVM, the binding is not working anymore.

I have attached a file.
Run the program and press add button
Enter info in First Name, then enter info in Last Name.
Put a break point in the file RecipientData.cs at the properties FirstName on get and set, and do the same for LastName properties.
In the xaml, the only difference between those 2 controls one the Mask="&gt;L1A29" for the first name and Mask="&gt;l1a29" for the last name.  I do not know what is going on behind the scene of this control, but I know there are some issues.

REASON FOR DECLINATION
This is expected behavior in the MaskedInputControls. Please read more in the comments.

Hi, I just updated all the UI telerik controls for wpf, and now none of my control in the code are working anymore.  It is from the version 2012.3.1017.40 to version 2014.3.1202.20.
Can anyone help me.

When you place items in the gallery there are scenarios where the tooltip of the scroll up/down buttons is not correct.

Available in LIB version: 2014.3.1402

Add a new media encoding control that can create video files frame by frame (from images) together with an audio track. Maybe support avi, mp4, wmv...

A button that once clicked shows a circular menu with additional choices the user can select.

I'd really like a WPF (and Silverlight) version of the Windows Phone Conversation View control.

Since you gave us CloudUpload, how about a "CloudDownload" so I can get the stuff I uploaded...

Also native support for OneDrive and Dropbox would be nice.

Thanks!

Steps to reproduce:

1. Set focus to the Body Text Area and insert some text (using typing or copy/paste).
2. Try to select a part of text for editing/removing:
---> [BUG]: The system shows error message and after that is frozen.
And for further work it's necessary to restart the system.
Please look at attached files.

We use successor of System.Windows.Controls.Button in the tile. 
The button's Command property is bound with ICommand implementation instance. It works ok on mouse click but doesn't work on touch. On touch it only gets focus but command doesn't executed.

We have not tried with onClick handler because we use MVVM.

Sample project to reproduce the problem is attached.

In the light of Microsoft announcing that they are open-sourcing the .NET framework[1], I think it will be really beneficial if you put your controls on GitHub, so the community can participate in the development. 
For example interested parties could implement solutions for more advanced scenarios themselves (I know you guys have to prioritize your work), instead of using ugly workarounds in their code. There are many cases where support for these scenarios is more appropriate inside the controls. Presently, any effort I would make with the provided source code for current release would be wasted when the next release arrives. Also, open discussion on how would be best to incorporate new features in the overall architecture would benefit everyone.

Another way of looking at this is when .NET becomes well supported on other platforms (Linux, OS X, ...) it would be hard to port your controls without the help of a larger team. The Linux community in general is especially proactive w.r.t. open source projects.

I hope you can agree that open development (discussions, code reviews, contributions, etc.) will give you a strong competitive advantage.

[1] http://blogs.msdn.com/b/dotnet/archive/2014/11/12/net-core-is-open-source.aspx

Provide complete Outlook 2013 Navigation Bar with item managemet (Sort, Hide Item, PersistenceManager, ....)

I know it sounds a little bit wired, but think of it:

Often we have to debug our programs at client side. What if we just could open a Powershell console inside our WPF app and inspect variables or start some maintenance scripts? 

As a starting point for the integration look the sample of Doug Finke's book "Windows Powershell for Developers" where he shows in chapter 5 how to do it. The sample is available on github: https://github.com/dfinke/powershell-for-developers/tree/master/chapter05

It would be perfect, if you provide a powershell editor console control with commandline history and so on. So one has just to throw in the WPF-control, provide the root application object and then we go.

I think this would be a unique control in your set of components and useful for nearly every developer!

Check out the visualization at https://github.com/mbostock/d3/wiki/Gallery

It would be great if you could incorporate

It could be an extension to the already available Persistence-Control or a complete Component of its own.

There are OneDrive, Dropbox, GoogleDrive, Amazon Clouddrive, to just name a few and there are many more. In germany there are HiDrive, Telekom Mediacenter, web.de-drive. You can find more on http://www.cloudsider.com/cloud-speicher.

It should provide methods to enumerate, upload and download files, create folders, maybe to download previews of files and file properties.

Such a component would make a perfect fit to extend your great Richtextbox, Diagram and Spreadsheet Controls!

So you could help many developers. But it should not depend on service like Teleriks everlive. 

I need to implement "next" and "previous" buttons on a form with a RadGridView to move betwen rows in a WPF form. I can't find any way to do it . In particular, there's no SelectedIndex to bind to.

Available in Q3 2014.

Similar to the Windows8 RadRadialMenu

RadRadialMenu is available in Q3 2014.