Resolved Getting an error message when dragging seat object onto user control

[sock1992]

I made a Seat class and inherited the PictureBox class:

    class seat : PictureBox
    {
        public string Row { get; set; }
        public int Number { get; set; }
        public string Seat => $"{Row}{Number}";
        public bool Available { get; set; }
    }
}

I'm getting the following pop up box when attempting to drag the item into the user control and i have no idea why.

Does anyone know why this is?

 

[Skydiver]

Very likely, your assembly didn't build correctly and so the reference the toolbox has is pointing to a non-existent assembly.

 

[sock1992]

Very likely, your assembly didn't build correctly and so the reference the toolbox has is pointing to a non-existent assembly.

I set the platform target to ANY CPU, rebuilt my project like 5 times, cleaned the solution and now it works