SFML hanging on RenderWindow close.

[inlinevoid]

I'm testing out SFML in C# and am having a slight problem.  When closing the window, or even just letting the main thread exit, the window itself will close but the program will hang for about 10 seconds before actually closing.  I'd appreciate any solutions.

namespace SFMLNET_Test
{
    class Program
    {
        static void Main(string[] args)
        {
            RenderWindow window = new RenderWindow(new VideoMode(1280, 720), "SFML", Styles.Close);
            window.Close();
        }
    }
}