RadioButton controls are grouped according to the container in which they are placed.

A well-designed program should validate the contents of multiple TextBoxes in a single statement.

Check boxes are similar to radio buttons in that they are both mutually exclusive.

The only way to run a program in Visual Studio is to click the Start Debugging button on the toolbar.

When you use the Properties window to change a control’s Visible property at design time, the control will become invisible in the Designer.

It is important that you do not modify the contents of the Form1.cs file because doing so will prevent the application from executing.

When you create Button controls, they are automatically given default names such as button1, button2, and so forth.

In a C# application, all buttons on a form must share the same Click event handler in the form’s source code file.

Each opening brace ( { )of a code container must have a matching closing brace ( } ) later in the program.

.NET provides classes to create Forms, TextBoxes, Labels, Buttons, and many other types of objects.