I'm bit new to C#. I just want to change the start up form in my project. (This is a windows form application). There is a field named with STARTUP OBJECT and a dropdownlist in Project properties. But my problem is I have created few forms in my project and those forms are not loaded to above mention dropdown list. (It is loaded 2 items which are "not set" and "MyProject.program") Due to that, I couldn't be able to change a startup form. Please show me a direction.