ArgumentNullException can be thrown when opening a RadOpenFileDialog in the following scenario: CustomPlaces contains the Desktop directory, InitialDirectory is also set to Desktop and ShowNetworkLocations is false. 

System.Windows.Data Error: 8 : Cannot save value from target back to source. BindingExpression:Path=CurrentParentDirectory; DataItem='OpenFileDialogViewModel' (HashCode=57416810); target element is 'FileDialogsBreadcrumb' (Name='PART_PathNavigationPane'); target property is 'CurrentItem' (type 'Object') ArgumentNullException:'System.ArgumentNullException: Value cannot be null.
Parameter name: value
   at System.String.StartsWith(String value)
   at Telerik.Windows.Controls.FileDialogs.Helpers.PathHelper.CapitalizeNetworkPath(String path)
   at Telerik.Windows.Controls.FileDialogs.ExplorerControl.BringItemIntoView(DirectoryBaseWrapper itemToBring)
   at Telerik.Windows.Controls.FileDialogs.ExplorerControl.SyncTreeViewWithCurrentDir()
   at Telerik.Windows.Controls.FileDialogs.ExplorerControl.ProcessCurrentParentDirChanged()
   at System.ComponentModel.PropertyChangedEventHandler.Invoke(Object sender, PropertyChangedEventArgs e)
   at Telerik.Windows.Controls.ViewModelBase.OnPropertyChanged(String propertyName)
   at Telerik.Windows.Controls.FileDialogs.OpenFileDialogViewModel.OnPropertyChanged(String propertyName)
   at Telerik.Windows.Controls.FileDialogs.DialogViewModel.set_CurrentParentDirectory(DirectoryBaseWrapper value)'

FileDialogs are constructed by RadWindow and ExplorerControl as its content. 

Explorer control holds navigation tree, autocomplete, filtering combobox, main pane for viewing fodler and files, search box, breadcrumb. You can check all visual parts in the following help article:

http://docs.telerik.com/devtools/wpf/controls/radfiledialogs/visual-structure

Users might need to put the ExplorerControl in non-window parts of their application (for example in docked RadPane of RadDocking. Also, they might need to override OK/Cancel commands for that purpose.

The following exception is thrown when a new file dialog is created on a separate thread and its ShowDialog method is invoked.
InvalidOperationException: "The calling thread cannot access this object because a different thread owns it."

This happens also if you define an ExplorerControl in any Window opened on another UI thread.


To work this around make sure that you use RadFileDialog and ExplorerControls only on the main UI thread. For example:

App.Current.Dispatcher.BeginInvoke(new Action(() =>
{
     RadOpenFileDialog openFileDialog = new RadOpenFileDialog();
     openFileDialog.ShowDialog();
}));

Provide built-in support for the following combinations:

• Move to the previous folder:  Backspace or Alt+Left Arrow combination
• Move to the next folder: Alt+Right Arrow combination
• Change layout: Ctrl + Mousewheel combination

ArithmeticException is thrown on RadSaveFileDialog's ShowDialog call, when the device model profile of the OS (from the Color Management menu) is set to sRGB virtual device model profile.

The profile should be set through the Change system defaults menu. This setting is accessed by opening the Color Management menu in the OS, then select the Advanced tab, then click on Change system defaults... In the newly opened dialog click Advanced again and change the Device profile to sRGB virtual device model profile.

This is actually a bug in the WPF framework that is reported here.

The important part of the exception stacktrace is the following:

System.ArithmeticException: Overflow or underflow in the arithmetic operation.
--- End of inner exception stack trace ---
at System.Windows.Media.Imaging.ColorConvertedBitmap.FinalizeCreation()
at System.Windows.Media.Imaging.ColorConvertedBitmap..ctor(BitmapSource source, ColorContext sourceColorContext, ColorContext destinationColorContext, PixelFormat format)
at System.Windows.Media.Imaging.BitmapSource.CreateCachedBitmap(BitmapFrame frame, BitmapSourceSafeMILHandle wicSource, BitmapCreateOptions createOptions, BitmapCacheOption cacheOption, BitmapPalette palette)
at System.Windows.Media.Imaging.BitmapFrameDecode.FinalizeCreation()
at System.Windows.Media.Imaging.BitmapFrameDecode..ctor(Int32 frameNumber, BitmapCreateOptions createOptions, BitmapCacheOption cacheOption, BitmapDecoder decoder)
at System.Windows.Media.Imaging.BitmapDecoder.SetupFrames(BitmapDecoder decoder, ReadOnlyCollection`1 frames)
at System.Windows.Media.Imaging.BitmapDecoder.get_Frames()
at System.Windows.Media.Imaging.BitmapFrame.CreateFromUriOrStream(Uri baseUri, Uri uri, Stream stream, BitmapCreateOptions createOptions, BitmapCacheOption cacheOption, RequestCachePolicy uriCachePolicy)
at System.Windows.Media.ImageSourceConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
at System.Windows.Baml2006.TypeConverterMarkupExtension.ProvideValue(IServiceProvider serviceProvider)

A binding error is thrown in RadOpenFolderDialog when it is shown.

 System.Windows.Data Error: 40 : BindingExpression path error: 'IsSearchActive' property not found on 'object' ''OpenFolderDialogViewModel' (HashCode=65514185)'. BindingExpression:Path=IsSearchActive; DataItem='OpenFolderDialogViewModel' (HashCode=65514185); target element is 'FileDialogSearchPane' (Name=''); target property is 'IsSearchViewActive' (type 'Boolean')