ES|QL LINQ for .NET

Type-safe Elasticsearch ES|QL development for .NET. Write LINQ expressions, get ES|QL query strings, execute against Elasticsearch. AOT compatible, zero reflection at runtime.

var results = await client.CreateQuery<LogEntry>()
    .From("logs-*")
    .Where(l => l.Level == "ERROR" && l.Duration > 1000)
    .OrderByDescending(l => l.Timestamp)
    .Take(50)
    .ToListAsync();
		

Produces:

FROM logs-*
| WHERE (log.level == "ERROR" AND duration > 1000)
| SORT @timestamp DESC
| LIMIT 50
		

Get started with ES|QL LINQ →

• Type-safe ES|QL: write LINQ, get correct ES|QL with full IntelliSense and compile-time checking
• 80+ translated functions: math, string, date/time, search, IP, cast, grouping, and aggregation functions
• LOOKUP JOIN: correlate data across indices with LeftJoin and LookupJoin
• COMPLETION: run LLM inference directly in ES|QL pipelines with preconfigured inference endpoints
• Async queries: submit long-running queries, poll for completion, stream results
• Named parameters: extract captured variables as ?param placeholders for parameterized queries
• AOT compatible: zero reflection at runtime, works with PublishAot=true
• System.Text.Json native: inherits naming policies and serialization behavior from your STJ configuration
• Streaming results: consume results as IAsyncEnumerable<T> for memory-efficient processing