From 8a8747fc0df0a61dd0974d32cd091bd45774b418 Mon Sep 17 00:00:00 2001
From: Cyrus Najmabadi <cyrus.najmabadi@gmail.com>
Date: Wed, 15 Aug 2018 10:31:19 -0700
Subject: [PATCH] Added comment.

---
 .../LanguageServices/RegexPatternDetector.cs                | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Workspaces/Core/Portable/EmbeddedLanguages/RegularExpressions/LanguageServices/RegexPatternDetector.cs b/src/Workspaces/Core/Portable/EmbeddedLanguages/RegularExpressions/LanguageServices/RegexPatternDetector.cs
index e922c764d60..6112f845318 100644
--- a/src/Workspaces/Core/Portable/EmbeddedLanguages/RegularExpressions/LanguageServices/RegexPatternDetector.cs
+++ b/src/Workspaces/Core/Portable/EmbeddedLanguages/RegularExpressions/LanguageServices/RegexPatternDetector.cs
@@ -176,6 +176,12 @@ private static bool IsMethodOrConstructorArgument(SyntaxToken token, ISyntaxFact
             => syntaxFacts.IsLiteralExpression(token.Parent) &&
                syntaxFacts.IsArgument(token.Parent.Parent);
 
+        /// <summary>
+        /// Finds public, static methods in <see cref="Regex"/> that have a parameter called
+        /// 'pattern'.  These are helpers (like <see cref="Regex.Replace(string, string, string)"/> 
+        /// where at least one (but not necessarily more) of the parameters should be treated as a
+        /// pattern.
+        /// </summary>
         private static HashSet<string> GetMethodNamesOfInterest(INamedTypeSymbol regexType, ISyntaxFactsService syntaxFacts)
         {
             var result = syntaxFacts.IsCaseSensitive
-- 
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