The snippet library.
Small, practical examples. Search by task or narrow things down below.
Copy a file without overwriting
C#: File.Copy defaults to refusing a destination that already exists.
C#✓ Tested
Create a file only when it does not exist
C#: FileMode.CreateNew prevents accidental replacement of existing content.
C#✓ Tested
Delete a known scratch file
C#: File.Delete ignores a missing file but still throws for other I/O failures.
C#✓ Tested
Enumerate matching files recursively
C#: Sort relative filenames when reproducible traversal output is required.
C#✓ Tested
Inspect a file length without reading it
C#: Use FileInfo.Length to retrieve a logical size in bytes.
C#✓ Tested
Move a file to a new filename
C#: File.Move changes the file path without loading its contents.
C#✓ Tested
Process a file as a lazy line sequence
C#: ReadLines avoids allocating one string containing the entire file.
C#✓ Tested
Read a filename stem and extension
C#: Use Path helpers instead of splitting a path on dots or directory separators.
C#✓ Tested
Replace a path extension
C#: Path.ChangeExtension transforms a path string without moving or creating a file.
C#✓ Tested
Write and read raw bytes
C#: Use the byte-oriented file APIs when no text encoding should be applied.
C#✓ Tested