Unable to maximize RadWindow

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Hello, i tried to create radWindow as main window. I followed Your tutorial and it working well, except maximizing of window. When maximize button is pressed, then it only move to top left corner, but app itself stays in same size. Attached screenshot of maximized window. 

<telerik:RadWindow x:Name="MainWin1" x:Class="BORIS_OIL.MainWin"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:local="clr-namespace:BORIS_OIL"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:lang = "clr-namespace:BORIS_OIL.Properties"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
        xmlns:navigation="clr-namespace:Telerik.Windows.Controls.Navigation;assembly=Telerik.Windows.Controls.Navigation"
        navigation:RadWindowInteropHelper.ShowInTaskbar="True"
        navigation:RadWindowInteropHelper.Icon="/Resources/aspera.ico"
        
        Header="{x:Static lang:Resources.App_Name}"  HorizontalAlignment="Center" VerticalAlignment="Center" WindowStartupLocation="CenterScreen" MinWidth="1366" MinHeight="768"  ResizeMode="CanResize" 
                >
    <telerik:RadWindow.Resources>
        
        <local:MainMenuViewModel x:Key="ViewModel" />
        <telerik:StringToGlyphConverter x:Key="StringToGlyphConverter" />

        <Style TargetType="telerik:RadNavigationViewItem" >
            <Setter Property="Content" Value="{Binding Title}" />
            <Setter Property="Icon" Value="{Binding IconGlyph}" />
            <Setter Property="IconTemplate">
                <Setter.Value>
                    <DataTemplate>
                        <telerik:RadGlyph Glyph="{Binding Converter={StaticResource StringToGlyphConverter}}" />
                    </DataTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <DataTemplate x:Key="TransitionControlContentTemplate">
            <TextBlock Margin="10" Text="{Binding Title}" />
        </DataTemplate>

    </telerik:RadWindow.Resources>
    
    <Grid>
        <telerik:RadNavigationView DataContext="{StaticResource ViewModel}"  ItemsSource="{Binding Items}" PaneHeader="Menu" >
            <telerik:RadNavigationView.Content>
                <telerik:RadTransitionControl Content="{Binding SelectedItem, RelativeSource={RelativeSource AncestorType=telerik:RadNavigationView}}" ContentTemplate="{StaticResource TransitionControlContentTemplate}" Foreground="Black" Duration="0:0:0.4">
                    <telerik:RadTransitionControl.Transition>
                        <telerik:FadeTransition />
                    </telerik:RadTransitionControl.Transition>
                </telerik:RadTransitionControl>
            </telerik:RadNavigationView.Content>
        </telerik:RadNavigationView>
    </Grid>
    

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Opened ticket 1515157

[Dinko | Tech Support Engineer]

Hi Tomas,

Thank you for the provided details.

We have already replied to your question in the support ticket. I am pasting the answer also here so that the community can take advantage of it.

I was able to observe the described behavior. The HorizontalAlignment and VerticalAlignment properties of the RadWindow are set. These properties are preventing the window from maximizing and work properly. I would suggest avoiding setting these properties. To center the window you can set the WindowStartupLocation property to CenterScreen.

Regards,
Dinko
Progress Telerik