Windows Forms Visual Inheritance
Occasionally, you may decide that a project calls for a form similar to one that you have created in a previous project. Or, you may want to create a basic form with settings such as a watermark or certain control layout that you will then use again within a project, with each iteration containing modifications to the original form template. Form inheritance enables you to create a base form and then inherit from it and make modifications while preserving whatever original settings you need.
You can create derived-class forms programmatically or by using the Visual Inheritance picker.