The correct answer is: Object Browser.
The Object Browser is a tool in Visual Studio that allows you to view the objects and classes that are available in the projects. It can be opened from the View menu or by pressing the key F2. The left column of the Object Browser lists the objects and classes that are available in the projects. The right column displays information about the selected object or class, such as its properties, methods, and events.
The Properties window is a tool in Visual Studio that allows you to view and modify the properties of an object. It can be opened by right-clicking on an object in the Solution Explorer and selecting Properties. The Project Explorer is a tool in Visual Studio that allows you to view the projects that are currently open in the IDE. It can be opened by clicking on the Project Explorer tab in the Solution Explorer window.
The Object Browser is a more specialized tool than the Properties window or the Project Explorer. It is specifically designed for viewing and working with objects and classes. The Properties window and the Project Explorer are more general-purpose tools that can be used for a variety of tasks.