From 192bfcd392dc7958ee29c9bbeb386ec5e6f9fa76 Mon Sep 17 00:00:00 2001
From: Ram Fattah <38049078+ramfattah@users.noreply.github.com>
Date: Wed, 9 Aug 2023 21:04:59 -0700
Subject: [PATCH] Update InterfaceConverter.cs

Resolve concurrency issues in InterfaceConverter's ReadJson method
---
 .../Converters/InterfaceConverter.cs                       | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/libraries/Microsoft.Bot.Builder.Dialogs.Declarative/Converters/InterfaceConverter.cs b/libraries/Microsoft.Bot.Builder.Dialogs.Declarative/Converters/InterfaceConverter.cs
index 02f625c781..d3feb9f8b8 100644
--- a/libraries/Microsoft.Bot.Builder.Dialogs.Declarative/Converters/InterfaceConverter.cs
+++ b/libraries/Microsoft.Bot.Builder.Dialogs.Declarative/Converters/InterfaceConverter.cs
@@ -2,6 +2,7 @@
 // Licensed under the MIT License.
 
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using Microsoft.Bot.Builder.Dialogs.Debugging;
 using Microsoft.Bot.Builder.Dialogs.Declarative.Debugging;
@@ -22,9 +23,9 @@ public class InterfaceConverter<T> : JsonConverter, IObservableConverter, IObser
         private readonly ResourceExplorer resourceExplorer;
         private readonly List<IJsonLoadObserver> observers = new List<IJsonLoadObserver>();
         private readonly SourceContext sourceContext;
-        private readonly Dictionary<string, T> cachedRefDialogs = new Dictionary<string, T>();
-        private readonly Dictionary<string, T> cachedTypes = new Dictionary<string, T>();
-        private readonly Dictionary<JToken, SourceRange> rangeReferences = new Dictionary<JToken, SourceRange>(JToken.EqualityComparer);
+        private readonly IDictionary<string, T> cachedRefDialogs = new ConcurrentDictionary<string, T>();
+        private readonly IDictionary<string, T> cachedTypes = new ConcurrentDictionary<string, T>();
+        private readonly IDictionary<JToken, SourceRange> rangeReferences = new ConcurrentDictionary<JToken, SourceRange>(JToken.EqualityComparer);
 
         /// <summary>
         /// Initializes a new instance of the <see cref="InterfaceConverter{T}"/> class.