diff --git a/Directory.Build.props b/Directory.Build.props
index c3c6150b3cd..6db67e877f6 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -43,14 +43,6 @@
   <PropertyGroup>
     <GenerateNeutralResourcesLanguageAttribute>false</GenerateNeutralResourcesLanguageAttribute>
 
-    <!--
-      Serialization/Deserialization of BinaryFormatter throws out System.NotSupportedException with latest .NET.
-      To work around temporarily add this property. The issues below are tracking this problem.
-      https://github.com/dotnet/msbuild/issues/9051
-      https://github.com/dotnet/msbuild/issues/8823
-    -->
-    <EnableUnsafeBinaryFormatterSerialization>true</EnableUnsafeBinaryFormatterSerialization>
-
     <!--
         NU1507: ManagePackageVersionsCentrally implies source mapping, which we should consider turning on but it's nontrivial
         NU1603: Microsoft.xunit.netcore.extensions package has dependencies to versions which aren't published, so ignore those warnings
diff --git a/src/Build.UnitTests/BackEnd/BuildManager_Logging_Tests.cs b/src/Build.UnitTests/BackEnd/BuildManager_Logging_Tests.cs
index f86d7d1c33e..f454dc1161d 100644
--- a/src/Build.UnitTests/BackEnd/BuildManager_Logging_Tests.cs
+++ b/src/Build.UnitTests/BackEnd/BuildManager_Logging_Tests.cs
@@ -80,7 +80,7 @@ public BuildManager_Logging_Tests(ITestOutputHelper output)
 
         [DotNetOnlyTheory]
         [InlineData("1", true)]
-        [InlineData("0", false)]
+        // [InlineData("0", true)] <-- explicitly opting out on core will lead to node crash (as documented)
         [InlineData(null, true)]
         public void Build_WithCustomBuildArgs_NetCore(string envVariableValue, bool isWarningExpected)
             => TestCustomEventWarning<BuildErrorEventArgs>(envVariableValue, isWarningExpected);
diff --git a/src/Build.UnitTests/BackEnd/TaskHostFactory_Tests.cs b/src/Build.UnitTests/BackEnd/TaskHostFactory_Tests.cs
index 5bf7c1a47eb..5c82a444f39 100644
--- a/src/Build.UnitTests/BackEnd/TaskHostFactory_Tests.cs
+++ b/src/Build.UnitTests/BackEnd/TaskHostFactory_Tests.cs
@@ -61,10 +61,21 @@ public void TaskNodesDieAfterBuild()
             }
         }
 
-        [Theory]
+        [DotNetOnlyTheory]
+        [InlineData(false)]
+        // [InlineData(true)] <-- explicitly opting out on core will lead to node crash
+        public void VariousParameterTypesCanBeTransmittedToAndReceivedFromTaskHost_NetCore(
+            bool testLegacyImplementation)
+            => VariousParameterTypesCanBeTransmittedToAndReceivedFromTaskHost(testLegacyImplementation);
+
+        [WindowsFullFrameworkOnlyTheory]
         [InlineData(false)]
         [InlineData(true)]
-        public void VariousParameterTypesCanBeTransmittedToAndReceivedFromTaskHost(bool testLegacyImplementation)
+        public void VariousParameterTypesCanBeTransmittedToAndReceivedFromTaskHost_Framework(
+            bool testLegacyImplementation)
+            => VariousParameterTypesCanBeTransmittedToAndReceivedFromTaskHost(testLegacyImplementation);
+
+        private void VariousParameterTypesCanBeTransmittedToAndReceivedFromTaskHost(bool testLegacyImplementation)
         {
             using TestEnvironment env = TestEnvironment.Create(_output);
 
diff --git a/src/Build.UnitTests/InvalidProjectFileException_Tests.cs b/src/Build.UnitTests/InvalidProjectFileException_Tests.cs
index 499927b7c47..8e1d50c18d6 100644
--- a/src/Build.UnitTests/InvalidProjectFileException_Tests.cs
+++ b/src/Build.UnitTests/InvalidProjectFileException_Tests.cs
@@ -22,42 +22,6 @@ public InvalidProjectFileExceptionTests(ITestOutputHelper output)
             _testOutput = output;
         }
 
-        /// <summary>
-        /// Verify I implemented ISerializable correctly
-        /// </summary>
-        [Fact]
-        public void SerializeDeserialize()
-        {
-            InvalidProjectFileException e = new InvalidProjectFileException(
-                "projectFile",
-                1, 2, 3, 4,
-                "message",
-                "errorSubcategory",
-                "errorCode",
-                "helpKeyword");
-
-            using (MemoryStream memstr = new MemoryStream())
-            {
-                BinaryFormatter frm = new BinaryFormatter();
-
-                frm.Serialize(memstr, e);
-                memstr.Position = 0;
-
-                InvalidProjectFileException e2 = (InvalidProjectFileException)frm.Deserialize(memstr);
-
-                Assert.Equal(e.ColumnNumber, e2.ColumnNumber);
-                Assert.Equal(e.EndColumnNumber, e2.EndColumnNumber);
-                Assert.Equal(e.EndLineNumber, e2.EndLineNumber);
-                Assert.Equal(e.ErrorCode, e2.ErrorCode);
-                Assert.Equal(e.ErrorSubcategory, e2.ErrorSubcategory);
-                Assert.Equal(e.HasBeenLogged, e2.HasBeenLogged);
-                Assert.Equal(e.HelpKeyword, e2.HelpKeyword);
-                Assert.Equal(e.LineNumber, e2.LineNumber);
-                Assert.Equal(e.Message, e2.Message);
-                Assert.Equal(e.ProjectFile, e2.ProjectFile);
-            }
-        }
-
         /// <summary>
         /// Verify that nesting an IPFE copies the error code
         /// </summary>
diff --git a/src/Build.UnitTests/LoggerException_Tests.cs b/src/Build.UnitTests/LoggerException_Tests.cs
deleted file mode 100644
index 6a052a7ee27..00000000000
--- a/src/Build.UnitTests/LoggerException_Tests.cs
+++ /dev/null
@@ -1,49 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-using System;
-using System.IO;
-using System.Runtime.Serialization.Formatters.Binary;
-using Microsoft.Build.Exceptions;
-using Microsoft.Build.Framework;
-using Xunit;
-
-#nullable disable
-
-namespace Microsoft.Build.UnitTests
-{
-    public class InternalLoggerExceptionTests
-    {
-        /// <summary>
-        /// Verify I implemented ISerializable correctly
-        /// </summary>
-        [Fact]
-        public void SerializeDeserialize()
-        {
-            InternalLoggerException e = new InternalLoggerException(
-                "message",
-                new Exception("innerException"),
-                new BuildStartedEventArgs("evMessage", "evHelpKeyword"),
-                "errorCode",
-                "helpKeyword",
-                false);
-
-            using (MemoryStream memstr = new MemoryStream())
-            {
-                BinaryFormatter frm = new BinaryFormatter();
-
-                frm.Serialize(memstr, e);
-                memstr.Position = 0;
-
-                InternalLoggerException e2 = (InternalLoggerException)frm.Deserialize(memstr);
-
-                Assert.Equal(e.BuildEventArgs.Message, e2.BuildEventArgs.Message);
-                Assert.Equal(e.BuildEventArgs.HelpKeyword, e2.BuildEventArgs.HelpKeyword);
-                Assert.Equal(e.ErrorCode, e2.ErrorCode);
-                Assert.Equal(e.HelpKeyword, e2.HelpKeyword);
-                Assert.Equal(e.Message, e2.Message);
-                Assert.Equal(e.InnerException.Message, e2.InnerException.Message);
-            }
-        }
-    }
-}
diff --git a/src/Framework.UnitTests/EventArgs_Tests.cs b/src/Framework.UnitTests/EventArgs_Tests.cs
index c2af0cbdef1..04a1c9e61ea 100644
--- a/src/Framework.UnitTests/EventArgs_Tests.cs
+++ b/src/Framework.UnitTests/EventArgs_Tests.cs
@@ -53,27 +53,6 @@ public void EventArgsCtors()
         }
         #endregion
 
-        /// <summary>
-        /// Verify a whidbey project started event can be deserialized, the whidbey event is stored in a serialized base64 string.
-        /// </summary>
-        [Fact]
-        public void TestDeserialization()
-        {
-            string base64OldProjectStarted = "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";
-            BinaryFormatter bf = new BinaryFormatter();
-            MemoryStream ms = new MemoryStream();
-            byte[] binaryObject = Convert.FromBase64String(base64OldProjectStarted);
-            ms.Write(binaryObject, 0, binaryObject.Length);
-            ms.Position = 0;
-            ProjectStartedEventArgs pse = (ProjectStartedEventArgs)bf.Deserialize(ms);
-            pse.Message.ShouldBe("message", StringCompareShould.IgnoreCase);
-            pse.ProjectFile.ShouldBe("projectFile", StringCompareShould.IgnoreCase);
-            pse.ProjectId.ShouldBe(-1);
-            pse.TargetNames.ShouldBe("targetNames", StringCompareShould.IgnoreCase);
-            pse.BuildEventContext.ShouldBe(BuildEventContext.Invalid);
-            pse.ParentProjectBuildEventContext.ShouldBe(BuildEventContext.Invalid);
-        }
-
         /// <summary>
         /// Verify the BuildEventContext is exercised
         /// </summary>
diff --git a/src/Framework.UnitTests/LoggerException_Tests.cs b/src/Framework.UnitTests/LoggerException_Tests.cs
deleted file mode 100644
index abc8c6fc726..00000000000
--- a/src/Framework.UnitTests/LoggerException_Tests.cs
+++ /dev/null
@@ -1,69 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-using System;
-using System.IO;
-using System.Runtime.Serialization.Formatters.Binary;
-using Microsoft.Build.Framework;
-using Shouldly;
-using Xunit;
-
-#nullable disable
-
-namespace Microsoft.Build.UnitTests
-{
-    public class LoggerExceptionTests
-    {
-        /// <summary>
-        /// Verify I implemented ISerializable correctly
-        /// </summary>
-        [Fact]
-        public void SerializeDeserialize()
-        {
-            LoggerException e = new LoggerException("message",
-                new Exception("innerException"),
-                "errorCode",
-                "helpKeyword");
-
-            using (MemoryStream memstr = new MemoryStream())
-            {
-                BinaryFormatter frm = new BinaryFormatter();
-
-                frm.Serialize(memstr, e);
-                memstr.Position = 0;
-
-                LoggerException e2 = (LoggerException)frm.Deserialize(memstr);
-
-                e2.ErrorCode.ShouldBe(e.ErrorCode);
-                e2.HelpKeyword.ShouldBe(e.HelpKeyword);
-                e2.Message.ShouldBe(e.Message);
-                e2.InnerException.ShouldNotBeNull();
-                e2.InnerException.Message.ShouldBe(e.InnerException?.Message);
-            }
-        }
-
-        /// <summary>
-        /// Verify I implemented ISerializable correctly, using other ctor
-        /// </summary>
-        [Fact]
-        public void SerializeDeserialize2()
-        {
-            LoggerException e = new LoggerException("message");
-
-            using (MemoryStream memstr = new MemoryStream())
-            {
-                BinaryFormatter frm = new BinaryFormatter();
-
-                frm.Serialize(memstr, e);
-                memstr.Position = 0;
-
-                LoggerException e2 = (LoggerException)frm.Deserialize(memstr);
-
-                e2.ErrorCode.ShouldBeNull();
-                e2.HelpKeyword.ShouldBeNull();
-                e2.Message.ShouldBe(e.Message);
-                e2.InnerException.ShouldBeNull();
-            }
-        }
-    }
-}
diff --git a/src/Shared/UnitTests/AssemblyNameEx_Tests.cs b/src/Shared/UnitTests/AssemblyNameEx_Tests.cs
index 8aa828b533c..5efa28ce676 100644
--- a/src/Shared/UnitTests/AssemblyNameEx_Tests.cs
+++ b/src/Shared/UnitTests/AssemblyNameEx_Tests.cs
@@ -679,68 +679,6 @@ public void VerifyReverseVersionComparer()
             Assert.True(assemblies[2].Equals(y));
         }
 
-        [Theory]
-        [InlineData("System.Xml")]
-        [InlineData("System.XML, Version=2.0.0.0")]
-        [InlineData("System.Xml, Culture=de-DE")]
-        [InlineData("System.Xml, Version=10.0.0.0, Culture=en, PublicKeyToken=b03f5f7f11d50a3a, Retargetable=Yes")]
-        [InlineData("System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
-        public void VerifyAssemblyNameExSerialization(string assemblyName)
-        {
-            AssemblyNameExtension assemblyNameOriginal = new AssemblyNameExtension(assemblyName);
-            AssemblyNameExtension assemblyNameDeserialized;
-
-            byte[] bytes;
-
-            using (MemoryStream ms = new MemoryStream())
-            {
-                BinaryFormatter formatter = new BinaryFormatter();
-                formatter.Serialize(ms, assemblyNameOriginal);
-
-                bytes = ms.ToArray();
-            }
-
-            using (MemoryStream ms = new MemoryStream(bytes))
-            {
-                BinaryFormatter formatter = new BinaryFormatter();
-                assemblyNameDeserialized = (AssemblyNameExtension)formatter.Deserialize(ms);
-            }
-
-            assemblyNameDeserialized.ShouldBe(assemblyNameOriginal);
-        }
-
-        [Fact]
-        public void VerifyAssemblyNameExSerializationWithRemappedFrom()
-        {
-            AssemblyNameExtension assemblyNameOriginal = new AssemblyNameExtension("System.Xml, Version=10.0.0.0, Culture=en, PublicKeyToken=b03f5f7f11d50a3a");
-            AssemblyNameExtension assemblyRemappedFrom = new AssemblyNameExtension("System.Xml, Version=9.0.0.0, Culture=en, PublicKeyToken=b03f5f7f11d50a3a");
-            assemblyRemappedFrom.MarkImmutable();
-            assemblyNameOriginal.AddRemappedAssemblyName(assemblyRemappedFrom);
-            assemblyNameOriginal.RemappedFromEnumerator.Count().ShouldBe(1);
-
-            AssemblyNameExtension assemblyNameDeserialized;
-
-            byte[] bytes;
-
-            using (MemoryStream ms = new MemoryStream())
-            {
-                BinaryFormatter formatter = new BinaryFormatter();
-                formatter.Serialize(ms, assemblyNameOriginal);
-
-                bytes = ms.ToArray();
-            }
-
-            using (MemoryStream ms = new MemoryStream(bytes))
-            {
-                BinaryFormatter formatter = new BinaryFormatter();
-                assemblyNameDeserialized = (AssemblyNameExtension)formatter.Deserialize(ms);
-            }
-
-            assemblyNameDeserialized.Equals(assemblyNameOriginal).ShouldBeTrue();
-            assemblyNameDeserialized.RemappedFromEnumerator.Count().ShouldBe(1);
-            assemblyNameDeserialized.RemappedFromEnumerator.First().ShouldBe(assemblyRemappedFrom);
-        }
-
         [Theory]
         [InlineData("System.Xml")]
         [InlineData("System.XML, Version=2.0.0.0")]
diff --git a/src/Shared/UnitTests/CopyOnWriteDictionary_Tests.cs b/src/Shared/UnitTests/CopyOnWriteDictionary_Tests.cs
index 9589762b100..8beef1b543f 100644
--- a/src/Shared/UnitTests/CopyOnWriteDictionary_Tests.cs
+++ b/src/Shared/UnitTests/CopyOnWriteDictionary_Tests.cs
@@ -192,53 +192,5 @@ public void CloneWritesNotVisibleToOriginal()
             Assert.Equal("1", dictionary["test"]);
             Assert.Equal("2", clone["test"]);
         }
-
-        /// <summary>
-        /// Serialize basic case
-        /// </summary>
-        [Fact]
-        public void SerializeDeserialize()
-        {
-            CopyOnWriteDictionary<string> dictionary = new CopyOnWriteDictionary<string>();
-            dictionary.Add("Key1", "1");
-
-            using (MemoryStream stream = new MemoryStream())
-            {
-                BinaryFormatter formatter = new BinaryFormatter();
-
-                formatter.Serialize(stream, dictionary);
-                stream.Position = 0;
-
-                var dictionary2 = (CopyOnWriteDictionary<string>)formatter.Deserialize(stream);
-
-                Assert.Equal(dictionary.Count, dictionary2.Count);
-                Assert.Equal(dictionary.Comparer, dictionary2.Comparer);
-                Assert.Equal("1", dictionary2["Key1"]);
-
-                dictionary2.Add("key2", "2");
-            }
-        }
-
-        /// <summary>
-        /// Serialize custom comparer
-        /// </summary>
-        [Fact]
-        public void SerializeDeserialize2()
-        {
-            CopyOnWriteDictionary<string> dictionary = new CopyOnWriteDictionary<string>(MSBuildNameIgnoreCaseComparer.Default);
-
-            using (MemoryStream stream = new MemoryStream())
-            {
-                BinaryFormatter formatter = new BinaryFormatter();
-
-                formatter.Serialize(stream, dictionary);
-                stream.Position = 0;
-
-                CopyOnWriteDictionary<string> deserialized = (CopyOnWriteDictionary<string>)formatter.Deserialize(stream);
-
-                deserialized.Count.ShouldBe(dictionary.Count);
-                deserialized.Comparer.ShouldBeOfType<MSBuildNameIgnoreCaseComparer>();
-            }
-        }
     }
 }