/// <summary>
/// Causes the scene to redraw its contents.
/// </summary>
/// <exception cref="InvalidOperationException">
/// <see cref="Resize" /> has not been called.
/// </exception>
/// <exception cref="ObjectDisposedException">
/// <see cref="Dispose()" /> has been called on this instance.
/// </exception>
public void Render()
{
MustNotDisposed();
_renderTarget.MustNotNull("Resize方法未调用");
Render(_renderTarget);
_device.Flush();
OnUpdated();
}