Microsoft Certified Solutions Developer (MCSD) Certification Practice Test 2025 – All-in-One Guide to Master Your Certification!

The correct choice is the File class in C#. This class provides a wide array of static methods that facilitate file operations, making it a fundamental component for working with files in .NET. Specifically, the File class allows developers to check for the existence of a file, delete files, move files to different locations, and a variety of other file-related tasks.

For example, methods such as File.Exists can be used to determine whether a specific file exists, while File.Delete can be invoked to remove a file from the file system. Similarly, File.Move is available for relocating files to a new path. This class encapsulates these file manipulation functionalities within an intuitive API, making it easier for developers to manage files efficiently.

In contrast, the other choices serve different purposes. The FileStream class is used primarily for reading from and writing to files using streams, which involves a more detailed approach to file I/O operations but does not provide direct methods for file existence checks or deletions. The Directory class is focused on operations pertaining to directories rather than individual files, such as creating, deleting, or moving directories. StreamReader is specifically designed for reading characters from a byte stream in a particular encoding, making it useful for reading file contents but not for performing operations like checking