.NET Framework Namespaces

Question 1

The most fundamental types in .NET live directly in which namespace?

Answer 1

They reside in the System namespace.
These include C#’s built-in types, the Exception base class, the Enum, Array, and Delegate base classes, and Nullable, Type, DateTime, TimeSpan, Guid, Math, Random, Convert, and BirConverter and more.

Question 2

Which namespace is the StringBuilder class contained in?

Answer 2

System.Text

Question 3

Under what namespace does the Regular Expressions class reside?

Answer 3

System.Text.RegularExpression

Question 4

How are non-generic collections referenced?

Answer 4

System.Collections

Question 5

How are generic collections referenced?

Answer 5

System.Collections.Generic

Question 6

How are strongly typed collections referenced?

Answer 6

System.Collections.Specialized

Question 7

Which namespace bases for your own collections?

Answer 7

System.Collections.ObjectModel

Question 8

How is a thread-safe collection referenced?

Answer 8

System.Collections.Concurrent