What does the .NET Base Class Library (BCL) provide?
Correct answer D. Core types such as System.String, collections, file I/O and threading used by all .NET programs
Explanation
The Base Class Library is the core set of types shipped with .NET, mostly in the System namespaces. It includes primitive types, strings, collections, file and network I/O, threading and reflection. Every .NET language uses the same BCL, so a C# List and a Visual Basic List(Of T) are the same type. Keywords belong to the language, not to the library.
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