From 1b119298021e122dbdfb5bf63c7a91d3e58a366b Mon Sep 17 00:00:00 2001
From: Andrew McClement <andrew.mcclement@aveva.com>
Date: Fri, 12 Apr 2024 18:59:52 +0100
Subject: [PATCH] Permit DictionaryContainsKeyValuePairConstraint to take in a
 null value, matching the nullability of DictionaryEntry.

---
 .../framework/Constraints/DictionaryContainsKeyConstraint.cs  | 4 ++--
 .../Constraints/DictionaryContainsKeyValuePairConstraint.cs   | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/NUnitFramework/framework/Constraints/DictionaryContainsKeyConstraint.cs b/src/NUnitFramework/framework/Constraints/DictionaryContainsKeyConstraint.cs
index c88bb34f58..2263def147 100644
--- a/src/NUnitFramework/framework/Constraints/DictionaryContainsKeyConstraint.cs
+++ b/src/NUnitFramework/framework/Constraints/DictionaryContainsKeyConstraint.cs
@@ -51,9 +51,9 @@ public DictionaryContainsKeyConstraint(object expected)
         /// Returns a new DictionaryContainsKeyValuePairConstraint checking for the
         /// presence of a particular key-value-pair in the dictionary.
         /// </summary>
-        public DictionaryContainsKeyValuePairConstraint WithValue(object expectedValue)
+        public DictionaryContainsKeyValuePairConstraint WithValue(object? expectedValue)
         {
-            return (DictionaryContainsKeyValuePairConstraint)Instead.Append(new DictionaryContainsKeyValuePairConstraint(Expected, expectedValue));
+            return Instead.Append(new DictionaryContainsKeyValuePairConstraint(Expected, expectedValue));
         }
 
         private bool Matches(object? actual)
diff --git a/src/NUnitFramework/framework/Constraints/DictionaryContainsKeyValuePairConstraint.cs b/src/NUnitFramework/framework/Constraints/DictionaryContainsKeyValuePairConstraint.cs
index 495cfe49c2..5022c90c54 100644
--- a/src/NUnitFramework/framework/Constraints/DictionaryContainsKeyValuePairConstraint.cs
+++ b/src/NUnitFramework/framework/Constraints/DictionaryContainsKeyValuePairConstraint.cs
@@ -19,7 +19,7 @@ public sealed class DictionaryContainsKeyValuePairConstraint : CollectionItemsEq
         /// <summary>
         /// Construct a DictionaryContainsKeyValuePairConstraint
         /// </summary>
-        public DictionaryContainsKeyValuePairConstraint(object key, object value)
+        public DictionaryContainsKeyValuePairConstraint(object key, object? value)
         {
             _expected = new DictionaryEntry(key, value);
         }