diff --git a/sdk/resourcemanager/Azure.ResourceManager.Core/src/ResourceIdentifier/ResourceIdentifier.cs b/sdk/resourcemanager/Azure.ResourceManager.Core/src/ResourceIdentifier/ResourceIdentifier.cs
index 82a9ff1800bd8..c14cf1ba9fff1 100644
--- a/sdk/resourcemanager/Azure.ResourceManager.Core/src/ResourceIdentifier/ResourceIdentifier.cs
+++ b/sdk/resourcemanager/Azure.ResourceManager.Core/src/ResourceIdentifier/ResourceIdentifier.cs
@@ -428,7 +428,7 @@ internal virtual string ToResourceString()
             StringBuilder builder = new StringBuilder(Parent.ToResourceString());
             if (IsChild)
             {
-                builder.Append($"/{ResourceType.Types.Last()}");
+                builder.Append($"/{ResourceType.Types[ResourceType.Types.Count - 1]}");
                 if (!string.IsNullOrWhiteSpace(Name))
                     builder.Append($"/{Name}");
             }
diff --git a/sdk/resourcemanager/Azure.ResourceManager.Core/src/ResourceIdentifier/ResourceType.cs b/sdk/resourcemanager/Azure.ResourceManager.Core/src/ResourceIdentifier/ResourceType.cs
index 660389434aa4c..4dc59237380a4 100644
--- a/sdk/resourcemanager/Azure.ResourceManager.Core/src/ResourceIdentifier/ResourceType.cs
+++ b/sdk/resourcemanager/Azure.ResourceManager.Core/src/ResourceIdentifier/ResourceType.cs
@@ -63,7 +63,10 @@ internal ResourceType(ResourceType parent, string childType)
         /// </summary>
         public string Type { get; private set; }
 
-        internal IList<string> Types { get; } = new List<string>();
+        /// <summary>
+        /// Gets the resource Types.
+        /// </summary>
+        public IReadOnlyList<string> Types { get; } = new List<string>();
 
         /// <summary>
         /// Determines if this resource type is the parent of the given resource.