Something

while(isRunning)
			{
				
				using ( MemoryStream ms = new MemoryStream() )
				{
					lm.GetBitmap(i, sdlPanel1.Width, sdlPanel1.Height).Save(ms, ImageFormat.Bmp);
					byte[] array = ms.ToArray();
					rgbSurfacePtr = SdlImage.IMG_Load_RW(Sdl.SDL_RWFromMem(array, array.Length), 1);
				}
				
				if (rgbSurfacePtr != IntPtr.Zero)
				{
					Sdl.SDL_Rect r1 = new Sdl.SDL_Rect(0,0,(short)sdlPanel1.Width,(short)sdlPanel1.Height);
					
					Sdl.SDL_BlitSurface(rgbSurfacePtr, ref r1, sdlPanel1.m_SdlSurface,ref r1);
										
					if((dynamic = (int)(Sdl.SDL_GetTicks() - starttime)) < goal_fps)
						Thread.Sleep(goal_fps - dynamic);
					
					//show frame
					Sdl.SDL_Flip(this.sdlPanel1.m_SdlSurface);
					
					starttime = Sdl.SDL_GetTicks();
					
					Sdl.SDL_FreeSurface(rgbSurfacePtr);
				}
				
			}