From dbc1bc5a514814f4d6e6951c06c88f7b64a06d68 Mon Sep 17 00:00:00 2001
From: Sam Harwell <sam@tunnelvisionlabs.com>
Date: Wed, 27 Feb 2013 12:59:44 -0600
Subject: [PATCH] Use HashSet instead of ISet for improved compatibility with
 earlier frameworks

---
 runtime/CSharp/Antlr4.Runtime/Atn/ATNConfig.cs       | 2 +-
 runtime/CSharp/Antlr4.Runtime/Atn/SemanticContext.cs | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/runtime/CSharp/Antlr4.Runtime/Atn/ATNConfig.cs b/runtime/CSharp/Antlr4.Runtime/Atn/ATNConfig.cs
index e455486d1..1e7d8ff97 100644
--- a/runtime/CSharp/Antlr4.Runtime/Atn/ATNConfig.cs
+++ b/runtime/CSharp/Antlr4.Runtime/Atn/ATNConfig.cs
@@ -403,7 +403,7 @@ namespace Antlr4.Runtime.Atn
             StringBuilder builder = new StringBuilder();
             builder.Append("digraph G {\n");
             builder.Append("rankdir=LR;\n");
-            ISet<PredictionContext> visited = new HashSet<PredictionContext>();
+            HashSet<PredictionContext> visited = new HashSet<PredictionContext>();
             Stack<PredictionContext> workList = new Stack<PredictionContext>();
             workList.Push(Context);
             visited.Add(Context);
diff --git a/runtime/CSharp/Antlr4.Runtime/Atn/SemanticContext.cs b/runtime/CSharp/Antlr4.Runtime/Atn/SemanticContext.cs
index e801b91ba..a2b21e7cb 100644
--- a/runtime/CSharp/Antlr4.Runtime/Atn/SemanticContext.cs
+++ b/runtime/CSharp/Antlr4.Runtime/Atn/SemanticContext.cs
@@ -386,7 +386,7 @@ namespace Antlr4.Runtime.Atn
         }
 
         private static IList<SemanticContext.PrecedencePredicate> FilterPrecedencePredicates
-            (ISet<SemanticContext> collection)
+            (HashSet<SemanticContext> collection)
         {
             if (!collection.OfType<PrecedencePredicate>().Any())
                 Collections.EmptyList<PrecedencePredicate>();