[.NET] Prefer the longest step keyword (#405)

Author: obligaron

CHANGELOG.md

@@ -11,6 +11,7 @@ This document is formatted according to the principles of [Keep A CHANGELOG](htt
 ### Fixed
 - [cpp] Actually use the VERSION file ([#376](https://github.com/cucumber/gherkin/pull/376))
 - [Java] Prefer the longest step keyword ([#401](https://github.com/cucumber/gherkin/pull/401))
+- [.NET] Prefer the longest step keyword ([#405](https://github.com/cucumber/gherkin/pull/405))
 - [PHP] Prefer the longest step keyword ([#403](https://github.com/cucumber/gherkin/pull/403))
 
 ## [32.1.1] - 2025-04-11

dotnet/Gherkin/GherkinDialect.cs

@@ -35,6 +35,7 @@ public class GherkinDialect(
         .Concat(andStepKeywords)
         .Concat(butStepKeywords)
         .Distinct()
+        .OrderByDescending(x => x.Length) // To avoid conflicts when some keywords are prefixes of others, try the longest keywords first.
         .ToArray();
 
     public IDictionary<string, StepKeywordType> StepKeywordTypes { get; } = new[] { new { Keyword = AsteriskKeyword, Type = StepKeywordType.Unknown } }