Windows Forms find all the active Form instance types.

Question

WinForms, how to find all the active windows of specific instance type.

Answer 1

You could do something like this using LINQ:

var forms = from f in Application.OpenForms.OfType<Form1>()
            select f;

Or if you had additional criteria, something like:

var forms = from f in Application.OpenForms.OfType<CustomerForm>()
            where f.HasChanges
            select f;

Answer 2

Thanks, thats exactly what i was after.