c# PropertyGrid and Interface property

Question

Problem: when object is having:

class A
{
    public ISomeinterface PropertyName { get; set; }
}

and then an instance of that class is assigned to propertyGrid.SelectedObject = new A(); then when trying to edit the value of PropertyName, an exception about fail to make instance of ISomeinterface is shown (make sense of course) the question is how to workaround this without break my class's and interfaces.?

Answer 1

Right, PropertyGrid has no hope of guessing how to assign the value. So, hide it:

class A
{
    [Browsable(false)]
    public ISomeinterface PropertyName { get; set; }
}

If property assignment is a requirement then you'll need to implement a UITypeEditor for the property.