C# Fibonacci
A small C# iterator Fibonacci utility — realistic snippet for language tooling.
using System;
using System.Collections.Generic;
namespace Novus.Examples;
public static class Fib
{
public static IEnumerable<int> Sequence(int count)
{
int a = 0, b = 1;
for (int i = 0; i < count; i++)
{
yield return a;
(a, b) = (b, a + b);
}
}
}
Specifications
- Language
- csharp
- Role
- idiomatic sample
- Line Endings
- LF
What is a .cs file?
C# (.cs) is a plain-text source file for Microsoft's C# language — a statically typed, object-oriented language on .NET. It features classes, records, LINQ, async/await, and nullable reference types.
How to use this file
Use an example .cs file to test syntax highlighters, Roslyn-based analyzers, formatters (dotnet format), and language-detection tooling.
How to use this file for testing
“C# Fibonacci” is a deterministic Novus Examples fixture for Syntax highlighting, Code parsing, Editor testing. Idiomatic hello-world programs and realistic snippets across sixteen languages, exercising comments, string escapes, interpolation, numeric literals, and language keywords — for testing syntax highlighters, editor themes, and tree-sitter grammars.
Documented properties for this file: idiomatic sample · csharp · LF. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such — expect parsers to fail loudly rather than silently accept them.
This is a short, known-correct source file. Run it through your syntax highlighter, linter, formatter, tree-sitter grammar, or parser, and open it in the in-browser editor to tweak and re-download. Each snippet exercises comments, string escapes, literals, and language keywords.
Code examples
dotnet run # or: csc fibonacci.csRelated files
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- csC# LINQ SAMPLEC# LINQ chain SAMPLE for Roslyn fixtures.
- csCsharp Lint Invalid — Empty Catch InvalidIntentionally lint-bait SAMPLE csharp snippet (empty-catch-invalid) for rule-engine tests.
- cC — Hello WorldThe classic hello-world in C — an include, main, and printf — for testing highlighters, C compilers, and parsers against the canonical first program.
- cC — Linked list (structs, malloc, pointers)A realistic C program: a singly linked list with a typedef struct, malloc/free memory management, pointer walking, and error handling — for testing highlighters, compilers, and static analysers.
- cC StructC struct SAMPLE for clangd / highlighter fixtures.
Generated by generation/code_wave_c.py. Free for any use, no attribution required — license.