From bc0cebb104b0c90708232d87378e3e6e7c33ab86 Mon Sep 17 00:00:00 2001
From: Simon Cropp <simon.cropp@gmail.com>
Date: Fri, 6 Oct 2023 21:24:13 +1100
Subject: [PATCH 1/2] remove duplicate dictionary lookups in
 ValidationRuleSet.Add

---
 src/Microsoft.OpenApi/Validations/ValidationRuleSet.cs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/Microsoft.OpenApi/Validations/ValidationRuleSet.cs b/src/Microsoft.OpenApi/Validations/ValidationRuleSet.cs
index 6cc4d3a05..8a641da4e 100644
--- a/src/Microsoft.OpenApi/Validations/ValidationRuleSet.cs
+++ b/src/Microsoft.OpenApi/Validations/ValidationRuleSet.cs
@@ -123,12 +123,13 @@ public IList<ValidationRule> Rules
         /// <param name="rule">The rule.</param>
         public void Add(ValidationRule rule)
         {
-            if (!_rules.ContainsKey(rule.ElementType))
+            if (!_rules.TryGetValue(rule.ElementType, out var item))
             {
-                _rules[rule.ElementType] = new List<ValidationRule>();
+                _rules[rule.ElementType] = new List<ValidationRule> {rule};
+                return;
             }
 
-            if (_rules[rule.ElementType].Contains(rule))
+            if (item.Contains(rule))
             {
                 throw new OpenApiException(SRResource.Validation_RuleAddTwice);
             }

From 88bb6b995cd379cc70c17517338635d510525844 Mon Sep 17 00:00:00 2001
From: Simon Cropp <simon.cropp@gmail.com>
Date: Fri, 6 Oct 2023 21:25:30 +1100
Subject: [PATCH 2/2] Update ValidationRuleSet.cs

---
 src/Microsoft.OpenApi/Validations/ValidationRuleSet.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Microsoft.OpenApi/Validations/ValidationRuleSet.cs b/src/Microsoft.OpenApi/Validations/ValidationRuleSet.cs
index 8a641da4e..f6bb84806 100644
--- a/src/Microsoft.OpenApi/Validations/ValidationRuleSet.cs
+++ b/src/Microsoft.OpenApi/Validations/ValidationRuleSet.cs
@@ -134,7 +134,7 @@ public void Add(ValidationRule rule)
                 throw new OpenApiException(SRResource.Validation_RuleAddTwice);
             }
 
-            _rules[rule.ElementType].Add(rule);
+            item.Add(rule);
         }
 
         /// <summary>