What is the difference between FileInfo and the static File class?

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ICSM Computer · Answer

The main difference between FileInfo and the static File class in C# lies in how they are used and their programming style: 1. FileInfo – Instance-Based API Requires creating an object tied to a specific file.Suitable when you’re working repeatedly with the same file.Properties like Length, Exists, and LastWriteTime are cached (for performance). 2. File – Static Utility Class Provides static methods for one-off operations.No need to create an object.Ideal for quick, simple tasks like copying or reading a file. Summary Table Feature FileInfo File (Static) Type Class (instance-based) Static class Initialization Requires new FileInfo(path) No object creation needed Performance Caches metadata (e.g., Length) No caching — re-reads every time Use Case Repeated operations on the same file Simple one-off file tasks Flexibility Can be extended or mocked Hard to mock (static methods)

What is the difference between FileInfo and the static File class?

1 Answers

1. `FileInfo` – Instance-Based API

2. `File` – Static Utility Class

Summary Table

Feature	`FileInfo`	`File` (Static)
Type	Class (instance-based)	Static class
Initialization	Requires `new FileInfo(path)`	No object creation needed
Performance	Caches metadata (e.g., `Length`)	No caching — re-reads every time
Use Case	Repeated operations on the same file	Simple one-off file tasks
Flexibility	Can be extended or mocked	Hard to mock (static methods)

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What is the difference between FileInfo and the static File class?

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1 Answers

1. FileInfo – Instance-Based API

2. File – Static Utility Class

Summary Table

1. `FileInfo` – Instance-Based API

2. `File` – Static Utility Class