ASP.NET by Example

Component-Based Features

Up to this point, we've focused on programs and even program fragments in introducing the concepts of the language. However, C# has several features that enable building component-based applications: namespaces, assemblies, and attributes.

Namespaces and Assemblies

Namespaces provide a logical organizational system, both internally within the program and externally to other programs. Consider the following example:

namespace Que.ByExample
{
    class Book
    { ...}

Because namespaces may be nested, the preceding example is functionally equivalent to

namespace Que
{
    namespace ByExample
    {
        class Book
        { ...}
    }
}

In either case, we can reference the Book class via its fully qualified namespace:

Que.ByExample.Book

We can avoid ...