CPF/CpfRazorSample/Test.razor

<WindowFrame MaximizeBox="true" Width='"100%"' Height="@("100%")">
    <StackPanel Background="#f00" Width='"100%"' Height="@("100%")">
        <Button Width="80" Height="30" MouseDown="OnMouseDown" Content="text">
        </Button>
        <CheckBox Content="12"></CheckBox>
        @if (visible)
        {
            <Panel Background="#0f0" Width="20" Height="30" MarginLeft="10"></Panel>
        }
        <Button>1234dsggs</Button>
        <TextBox Text="@text"></TextBox>
        <Button><CheckBox></CheckBox></Button>
    </StackPanel>
</WindowFrame>
@code
{
    bool visible = false;
    string text = "test";
    void OnMouseDown(CPF.Input.MouseButtonEventArgs e)
    {
        text = "test" + visible;
        visible = !visible;
    }
}