Question

In my winforms application I am using form.ActiveForm from another form a lot of times. This is because I don’t want a new instance of the form but just to bring the form to the front or to set it’s components differently. I noticed however that when I minimize the form, form.ActiveForm returns a NullReferenceException. What can I do so that I can access this minimized form? There doesn’t seem to be a method for it. Is there another way to do this?

Answer 1

Use Application.OpenForms to find a form of the correct type:

foreach (var f in Application.OpenForms)
{
    if (f is MyForm)
    {
        // do something...
        break;
    }
}