WPF window style not applied

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WPF

WPF-Toolkit

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I have this window:

<Window x:Class="YogevAfekaRAPAT.YNIDS.View.pleaseWaitWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
        Title="please wait"
        WindowStyle="None"
        ResizeMode="NoResize">
    <xctk:BusyIndicator Name="BusyIndicator" IsBusy="True" BusyContent="Please Wait..." >
    </xctk:BusyIndicator>
</Window>

But for some reason the window style is not being applied.
I don't want the window to look like a window but like a small box that have the busy indicator

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