/// <summary>
/// Gets a swap chain back buffer.
/// </summary>
/// <param name="swapChain">The swap chain to get the buffer from.</param>
/// <param name="index">The index of the desired buffer.</param>
/// <returns>The buffer interface, or <c>null</c> on failure.</returns>
public static Surface FromSwapChain(SwapChain swapChain, int index)
{
IntPtr surfacePointer;
swapChain.GetBuffer(index, Utilities.GetGuidFromType(typeof(Surface)), out surfacePointer);
return(new Surface(surfacePointer));
}