added Issue 4670

Issue4670/GlobalUsings.cs

@@ -0,0 +1 @@
+global using NUnit.Framework;

Issue4670/Issue4670.csproj

@@ -0,0 +1,26 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+    <IsTestProject>true</IsTestProject>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
+    <PackageReference Include="NUnit" Version="4.1.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
+    <PackageReference Include="NUnit.Analyzers" Version="4.1.0">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="6.0.2">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+</Project>

Issue4670/Issue4670.sln

@@ -0,0 +1,22 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Issue4670", "Issue4670.csproj", "{491A5BD4-1DCE-48C1-92AA-D39307FCD7A0}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{491A5BD4-1DCE-48C1-92AA-D39307FCD7A0}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{491A5BD4-1DCE-48C1-92AA-D39307FCD7A0}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{491A5BD4-1DCE-48C1-92AA-D39307FCD7A0}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{491A5BD4-1DCE-48C1-92AA-D39307FCD7A0}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

Issue4670/UnitTest1.cs

@@ -0,0 +1,28 @@
+namespace Issue4670;
+
+public class Tests
+{
+    [Test]
+    public void BugReport()
+    {
+        var dictionary = new Dictionary<string, int>
+    {
+        { "a", 123 },
+        { "b", 456 }
+    };
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(dictionary, Does.ContainKey("a").WithValue(456).Or.ContainKey("b").WithValue(123), "Passes but should fail");
+            Assert.That(dictionary, Does.ContainKey("a").WithValue(456).And.ContainKey("b").WithValue(456), "Passes but should fail");
+
+            // Expected: dictionary containing key "c" or dictionary containing entry ["c", 456]
+            // But was:  < ["a", 123], ["b", 456] >
+            Assert.That(dictionary, Does.ContainKey("a").WithValue(123).Or.ContainKey("c").WithValue(456), "Fails but should pass");
+
+            // Expected: dictionary containing key "c" and dictionary containing entry ["c", 456]
+            // But was:  < ["a", 123], ["b", 456] >
+            Assert.That(dictionary, Does.ContainKey("a").WithValue(123).And.ContainKey("c").WithValue(456), "Fails but for the wrong reason");
+        });
+    }
+}