CSharp Examples
C#Oct 23, 2026Base64 encode and decode UTF-8 text safely
Encodes UTF-8 text as Base64 and decodes it back, rejecting malformed input with a descriptive FormatException.
C#Oct 23, 2026Render an aligned plain-text table from string rows
Renders string rows as an aligned plain-text table with padded columns, a header separator rule and no external packages.
C#Oct 23, 2026Field-level input validation returning error dictionary
Validates signup fields and returns a field-to-message error dictionary instead of throwing on the first problem it finds.
C#Oct 23, 2026Build and parse URL query strings with escaping
Builds URL query strings with percent encoding and parses them back into a dictionary, treating plus signs as encoded spaces.
C#Oct 23, 2026JSON deserialization with line and byte error info
Deserializes JSON and rewraps parse failures with the line, byte position and label so bad payloads are easy to diagnose.
C#Oct 23, 2026Bounded worker pool with Parallel.ForEachAsync
Runs items through a fixed number of parallel workers and returns the success count along with every exception that was thrown.
C#Oct 23, 2026HTTP GET JSON with cancellation-based timeout
Performs an HTTP GET, enforces a millisecond timeout, and deserializes the JSON body into the requested type.
C#Oct 23, 2026Read and validate environment variables with defaults
Reads environment variables with typed defaults and throws clear errors when required values are missing or fail validation.
C#Oct 23, 2026Bounded LRU cache backed by LinkedList and Dictionary
Bounded LRU cache that evicts the least recently used entry once capacity is reached, with constant-time lookups and updates.
C#Oct 23, 2026Token bucket rate limiter using Stopwatch
Burst-tolerant token bucket limiter that refills from a monotonic clock and rejects calls that exceed the configured average rate.
C#Oct 23, 2026Multi-key stable sort with nulls last using LINQ
Stable multi-key sort of records by team, score and name, placing records with a null team at the end of the list.
C#Oct 23, 2026Stream a text file line by line with StreamReader
Streams a text file one line at a time with StreamReader, skipping empty lines and never loading the whole file into memory.
C#Oct 23, 2026Chunk an IEnumerable into fixed-size List batches
Splits any IEnumerable into fixed-size List batches, yielding the final partial batch with whatever items remain.
C#Oct 23, 2026Deep clone and recursive merge of JsonObject trees
Deep-copies a JsonNode tree and recursively merges JSON objects, with source values overwriting matching target keys.
C#Oct 23, 2026Async retry helper with capped exponential backoff
Retries an async operation with capped exponential backoff and jitter so transient failures recover without hammering a service.