<DockPanel>
        <Calendar DockPanel.Dock="Top"></Calendar>
        <Button Name="Button"
                Content="Text"
                DockPanel.Dock="Top"></Button>
        <Button Content="Text"
                DockPanel.Dock="Top"></Button>
        <Button Content="Text"
                DockPanel.Dock="Top"></Button>
        <Button Content="Text"
                DockPanel.Dock="Top"></Button>

        <Canvas></Canvas>

    </DockPanel>