swapchainTexture null check

src/ProjectNameGame.cs

@@ -26,11 +26,14 @@ namespace ProjectName
 			var commandBuffer = GraphicsDevice.AcquireCommandBuffer();
 			var swapchainTexture = commandBuffer.AcquireSwapchainTexture(MainWindow);
 
+			if (swapchainTexture != null)
+			{
 				commandBuffer.BeginRenderPass(
 					new ColorAttachmentInfo(swapchainTexture, Color.CornflowerBlue)
 				);
 
 				commandBuffer.EndRenderPass();
+			}
 
 			GraphicsDevice.Submit(commandBuffer);
 		}