<TelerikWindow Width="80%"
Height="auto"
Top="404px"
State="WindowState.Minimized"
Left="200px"
Class="myClass"
Visible="true"
><WindowTitle>My Title</WindowTitle><WindowActions><WindowAction Name="Minimize"></WindowAction></WindowActions><WindowContent><h1>My Content</h1></WindowContent></TelerikWindow>
Window starts out minimized, with proper width, height, top and left.
Clicking maximize button clears the top and left property, and resets position every time you open/close.
If you change the state to to WindowState.Maximized, it has the correct top/left property, but resets the width/height properties.
Window is not draggable.
Not setting the State at all is the only way to have proper behavior.