Object of type “X” cannot be converted to object of type “X”

Question

(Can\'t believe this hasn\'t already been asked, but I can\'t find a dup)

In Visual Studio with lots of projects, when I first open the solution, I sometime

Answer 1

If you have a user control that exposes an object with a getter/setter, you are going to have a bad time (as they say). It is, in fact, the setter that is the problem.

SO to fix it, instead of doing this:

public ObjectX
{
    get { return _objx; }
    set 
    {
        _objx=value; 
        //do some other stuff
    }
}

You could do something along the lines of this:

public ObjectX
{
    get { return _objx; }
}
public void SetObjectX(ObjectX inVal)
{
    _objx = inVal; 
    //do some other stuff
}

... which will prevent the Visual Designer from trying to assign a serialized version of ObjectX to your control at design time, which is really what was going on ...