C# Custom Control doesn't show up in the toolbox

Question

I have created the custom control which is just a panel that I will be using to render my DirectX code. However, I am unable to see the control in my toolbox for when I try to a

Answer 1

Did you right click on the toolbox and click "Choose Items", and then browse to the built assembly that contains your custom control?

That's what I always have to do, and then my custom controls show up in the "General" section of the toolbox.