diff --git a/eng/Packages.props b/eng/Packages.props
index 0b85f2c0dcd..ac8df77f629 100644
--- a/eng/Packages.props
+++ b/eng/Packages.props
@@ -19,7 +19,6 @@
     <PackageVersion Include="NuGet.Frameworks" Version="$(NuGetBuildTasksVersion)" />
     <PackageVersion Include="System.Collections.Immutable" Version="$(SystemCollectionsImmutableVersion)" />
     <PackageVersion Include="System.Configuration.ConfigurationManager" Version="$(SystemConfigurationConfigurationManagerVersion)" />
-    <PackageVersion Include="System.Formats.Asn1" Version="$(SystemFormatsAsn1Version)" />
     <PackageVersion Include="System.Memory" Version="$(SystemMemoryVersion)" />
     <PackageVersion Include="System.Net.Http" Version="$(SystemNetHttpVersion)" />
     <PackageVersion Include="System.Reflection.Metadata" Version="$(SystemReflectionMetadataVersion)" />
diff --git a/eng/SourceBuildPrebuiltBaseline.xml b/eng/SourceBuildPrebuiltBaseline.xml
index c27e7fdbc16..73a2dd31105 100644
--- a/eng/SourceBuildPrebuiltBaseline.xml
+++ b/eng/SourceBuildPrebuiltBaseline.xml
@@ -4,16 +4,13 @@
 <UsageData>
   <IgnorePatterns>
     <UsagePattern IdentityGlob="Microsoft.SourceBuild.Intermediate.*/*" />
-    <UsagePattern IdentityGlob="System.Formats.Asn1/*8.0.1*" />
-    <UsagePattern IdentityGlob="System.Collections.Immutable/*8.0.0*" />
-    
     <!-- Baseline 7.0 dependencies until msbuild targets net8 and uses a net8 arcade, SBRP, etc.
          These cannot be added to 7.0 SBRP, because they would are produced in the 7.0 build. -->
     <UsagePattern IdentityGlob="System.Configuration.ConfigurationManager/*7.0.0*" />
     <UsagePattern IdentityGlob="System.Diagnostics.EventLog/*7.0.0*" />
     <UsagePattern IdentityGlob="System.Reflection.MetadataLoadContext/*7.0.0*" />
     <UsagePattern IdentityGlob="System.Security.Cryptography.ProtectedData/*7.0.0*" />
-    <UsagePattern IdentityGlob="System.Text.Json/*8.0.5*" />
+    <UsagePattern IdentityGlob="System.Text.Json/*7.0.3*" />
   </IgnorePatterns>
   <Usages>
   </Usages>
diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 3a604bf66c8..40db7faeb74 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -14,9 +14,9 @@
     <!-- Necessary for source-build due to being a transitive dependency of System.Reflection.MetadataLoadContext.
       This allows the package to be retrieved from previously-source-built artifacts and flow in as dependencies
       of the packages produced by msbuild. -->
-    <Dependency Name="System.Collections.Immutable" Version="8.0.0">
-      <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-runtime</Uri>
-      <Sha>5535e31a712343a63f5d7d796cd874e563e5ac14</Sha>
+    <Dependency Name="System.Collections.Immutable" Version="7.0.0">
+      <Uri>https://github.com/dotnet/runtime</Uri>
+      <Sha>d099f075e45d2aa6007a22b71b45a08758559f80</Sha>
     </Dependency>
     <!-- Necessary for source-build. This allows the package to be retrieved from previously-source-built artifacts
       and flow in as dependencies of the packages produced by msbuild. -->
@@ -52,17 +52,13 @@
       <Uri>https://github.com/dotnet/runtime</Uri>
       <Sha>d099f075e45d2aa6007a22b71b45a08758559f80</Sha>
     </Dependency>
-    <Dependency Name="System.Text.Json" Version="8.0.5">
-      <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-runtime</Uri>
-      <Sha>81cabf2857a01351e5ab578947c7403a5b128ad1</Sha>
-    </Dependency>
-    <Dependency Name="System.Formats.Asn1" Version="8.0.1">
-      <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-runtime</Uri>
-      <Sha>2aade6beb02ea367fd97c4070a4198802fe61c03</Sha>
+    <Dependency Name="System.Text.Json" Version="7.0.3">
+      <Uri>https://github.com/dotnet/runtime</Uri>
+      <Sha>5b20af47d99620150c53eaf5db8636fdf730b126</Sha>
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="8.0.0-beta.25208.7">
+     <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="8.0.0-beta.25208.7">
       <Uri>https://github.com/dotnet/arcade</Uri>
       <Sha>c7a36e53f91e41943746f97a8c183549364c5092</Sha>
       <SourceBuild RepoName="arcade" ManagedOnly="true" />
@@ -86,4 +82,4 @@
       <Sha>c7a36e53f91e41943746f97a8c183549364c5092</Sha>
     </Dependency>
   </ToolsetDependencies>
-</Dependencies>
+</Dependencies>
\ No newline at end of file
diff --git a/eng/Versions.props b/eng/Versions.props
index 367f906bc2a..89e6542336a 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -2,7 +2,7 @@
 <!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the MIT license. See License.txt in the project root for full license information. -->
 <Project>
   <PropertyGroup>
-    <VersionPrefix>17.8.26</VersionPrefix>
+    <VersionPrefix>17.8.29</VersionPrefix>
     <DotNetFinalVersionKind>release</DotNetFinalVersionKind>
     <PackageValidationBaselineVersion>17.7.0</PackageValidationBaselineVersion>
     <AssemblyVersion>15.1.0.0</AssemblyVersion>
@@ -27,9 +27,8 @@
   </PropertyGroup>
   <!-- Production Dependencies -->
   <PropertyGroup>
-    <SystemCollectionsImmutableVersion>8.0.0</SystemCollectionsImmutableVersion>
+    <SystemCollectionsImmutableVersion>7.0.0</SystemCollectionsImmutableVersion>
     <SystemConfigurationConfigurationManagerVersion>7.0.0</SystemConfigurationConfigurationManagerVersion>
-    <SystemFormatsAsn1Version>8.0.1</SystemFormatsAsn1Version>
     <!--
         Modifying the version of System.Memory is very high impact and causes downstream breaks in third-party tooling that uses the MSBuild API.
         When updating the version of System.Memory file a breaking change here: https://github.com/dotnet/docs/issues/new?assignees=gewarren&labels=breaking-change%2CPri1%2Cdoc-idea&template=breaking-change.yml&title=%5BBreaking+change%5D%3A+
@@ -51,11 +50,11 @@
     <MicrosoftCodeAnalysisCollectionsVersion>4.2.0-1.22102.8</MicrosoftCodeAnalysisCollectionsVersion>
     <MicrosoftDotNetXUnitExtensionsVersion>8.0.0-beta.25208.7</MicrosoftDotNetXUnitExtensionsVersion>
     <MicrosoftExtensionsDependencyModelVersion>7.0.0</MicrosoftExtensionsDependencyModelVersion>
-    <MicrosoftIORedistVersion>6.0.1</MicrosoftIORedistVersion>
+    <MicrosoftIORedistVersion>6.0.0</MicrosoftIORedistVersion>
     <MicrosoftNetCompilersToolsetVersion>4.8.0-3.23465.5</MicrosoftNetCompilersToolsetVersion>
     <NuGetBuildTasksVersion>6.8.0-rc.112</NuGetBuildTasksVersion>
     <SystemRuntimeCompilerServicesUnsafeVersion>6.0.0</SystemRuntimeCompilerServicesUnsafeVersion>
-    <SystemTextJsonVersion>8.0.5</SystemTextJsonVersion>
+    <SystemTextJsonVersion>7.0.3</SystemTextJsonVersion>
     <SystemThreadingTasksDataflowVersion>7.0.0</SystemThreadingTasksDataflowVersion>
   </PropertyGroup>
   <Target Name="OverrideArcadeFileVersion" AfterTargets="_InitializeAssemblyVersion">
diff --git a/eng/cibuild_bootstrapped_msbuild.ps1 b/eng/cibuild_bootstrapped_msbuild.ps1
index 46d471d042b..2c4bb6601a9 100644
--- a/eng/cibuild_bootstrapped_msbuild.ps1
+++ b/eng/cibuild_bootstrapped_msbuild.ps1
@@ -64,67 +64,11 @@ try {
 
   if ($buildStage1)
   {
-    & $PSScriptRoot\Common\Build.ps1 -restore -build -ci -msbuildEngine $msbuildEngine /p:CreateBootstrap=true @properties
+    & $PSScriptRoot\Common\Build.ps1 -restore -build -test -ci -msbuildEngine $msbuildEngine /p:CreateBootstrap=true @properties
   }
 
   KillProcessesFromRepo
 
-  $bootstrapRoot = Join-Path $Stage1BinDir "bootstrap"
-
-  # we need to do this to guarantee we have/know where dotnet.exe is installed
-  $dotnetToolPath = InitializeDotNetCli $true
-  $dotnetExePath = Join-Path $dotnetToolPath "dotnet.exe"
-
-  if ($msbuildEngine -eq 'vs')
-  {
-    $buildToolPath = Join-Path $bootstrapRoot "net472\MSBuild\Current\Bin\MSBuild.exe"
-    $buildToolCommand = "";
-    $buildToolFramework = "net472"
-
-    if ($configuration -eq "Debug-MONO" -or $configuration -eq "Release-MONO")
-    {
-      # Copy MSBuild.dll to MSBuild.exe so we can run it without a host
-      $sourceDll = Join-Path $bootstrapRoot "net472\MSBuild\Current\Bin\MSBuild.dll"
-      Copy-Item -Path $sourceDll -Destination $msbuildToUse
-    }
-  }
-  else
-  {
-    $buildToolPath = $dotnetExePath
-    $buildToolCommand = Join-Path $bootstrapRoot "net8.0\MSBuild\MSBuild.dll"
-    $buildToolFramework = "net8.0"
-  }
-
-  # Use separate artifacts folder for stage 2
-  # $env:ArtifactsDir = Join-Path $ArtifactsDir "2\"
-
-  & $dotnetExePath build-server shutdown
-
-  if ($buildStage1)
-  {
-    if (Test-Path $Stage1Dir)
-    {
-      Remove-Item -Force -Recurse $Stage1Dir
-    }
-
-    Move-Item -Path $ArtifactsDir -Destination $Stage1Dir -Force
-  }
-
-  $buildTool = @{ Path = $buildToolPath; Command = $buildToolCommand; Tool = $msbuildEngine; Framework = $buildToolFramework }
-  $global:_BuildTool = $buildTool
-
-  # Ensure that debug bits fail fast, rather than hanging waiting for a debugger attach.
-  $env:MSBUILDDONOTLAUNCHDEBUGGER="true"
-
-  # Opt into performance logging. https://github.com/dotnet/msbuild/issues/5900
-  $env:DOTNET_PERFLOG_DIR=$PerfLogDir
-
-  # When using bootstrapped MSBuild:
-  # - Turn off node reuse (so that bootstrapped MSBuild processes don't stay running and lock files)
-  # - Do run tests
-  # - Don't try to create a bootstrap deployment
-  & $PSScriptRoot\Common\Build.ps1 -restore -build -test -ci /p:CreateBootstrap=false /nr:false @properties
-
   exit $lastExitCode
 }
 catch {
diff --git a/eng/cibuild_bootstrapped_msbuild.sh b/eng/cibuild_bootstrapped_msbuild.sh
index ceb2b343329..9d4b441ed3c 100755
--- a/eng/cibuild_bootstrapped_msbuild.sh
+++ b/eng/cibuild_bootstrapped_msbuild.sh
@@ -55,7 +55,7 @@ fi
 
 if [[ $build_stage1 == true ]];
 then
-	/bin/bash "$ScriptRoot/common/build.sh" --restore --build --ci --configuration $configuration /p:CreateBootstrap=true $properties $extra_properties || exit $?
+	/bin/bash "$ScriptRoot/common/build.sh" --restore --build --ci --test --configuration $configuration /p:CreateBootstrap=false $properties $extra_properties || exit $?
 fi
 
 bootstrapRoot="$Stage1Dir/bin/bootstrap"
@@ -93,9 +93,3 @@ export DOTNET_PERFLOG_DIR=$PerfLogDir
 # Prior to 3.0, the Csc task uses this environment variable to decide whether to run
 # a CLI host or directly execute the compiler.
 export DOTNET_HOST_PATH="$_InitializeDotNetCli/dotnet"
-
-# When using bootstrapped MSBuild:
-# - Turn off node reuse (so that bootstrapped MSBuild processes don't stay running and lock files)
-# - Do run tests
-# - Don't try to create a bootstrap deployment
-. "$ScriptRoot/common/build.sh" --restore --build --test --ci --nodereuse false --configuration $configuration /p:CreateBootstrap=false $properties $extra_properties
diff --git a/eng/common/templates-official/job/source-build.yml b/eng/common/templates-official/job/source-build.yml
index f983033bb02..ae8f0c8d014 100644
--- a/eng/common/templates-official/job/source-build.yml
+++ b/eng/common/templates-official/job/source-build.yml
@@ -54,7 +54,7 @@ jobs:
     pool:
       ${{ if eq(variables['System.TeamProject'], 'public') }}:
         name: $[replace(replace(eq(contains(coalesce(variables['System.PullRequest.TargetBranch'], variables['Build.SourceBranch'], 'refs/heads/main'), 'release'), 'true'), True, 'NetCore-Svc-Public' ), False, 'NetCore-Public')]
-        demands: ImageOverride -equals Build.Ubuntu.1804.Amd64.Open
+        demands: ImageOverride -equals Build.Ubuntu.2004.Amd64.Open
 
       ${{ if eq(variables['System.TeamProject'], 'internal') }}:
         name: $[replace(replace(eq(contains(coalesce(variables['System.PullRequest.TargetBranch'], variables['Build.SourceBranch'], 'refs/heads/main'), 'release'), 'true'), True, 'NetCore1ESPool-Svc-Internal'), False, 'NetCore1ESPool-Internal')]
diff --git a/eng/common/templates/job/source-build.yml b/eng/common/templates/job/source-build.yml
index c0ff472b697..1c9de37a095 100644
--- a/eng/common/templates/job/source-build.yml
+++ b/eng/common/templates/job/source-build.yml
@@ -54,11 +54,11 @@ jobs:
     pool:
       ${{ if eq(variables['System.TeamProject'], 'public') }}:
         name: $[replace(replace(eq(contains(coalesce(variables['System.PullRequest.TargetBranch'], variables['Build.SourceBranch'], 'refs/heads/main'), 'release'), 'true'), True, 'NetCore-Svc-Public' ), False, 'NetCore-Public')]
-        demands: ImageOverride -equals Build.Ubuntu.1804.Amd64.Open
+        demands: ImageOverride -equals Build.Ubuntu.2004.Amd64.Open
 
       ${{ if eq(variables['System.TeamProject'], 'internal') }}:
         name: $[replace(replace(eq(contains(coalesce(variables['System.PullRequest.TargetBranch'], variables['Build.SourceBranch'], 'refs/heads/main'), 'release'), 'true'), True, 'NetCore1ESPool-Svc-Internal'), False, 'NetCore1ESPool-Internal')]
-        demands: ImageOverride -equals Build.Ubuntu.1804.Amd64
+        demands: ImageOverride -equals Build.Ubuntu.2004.Amd64
 
   ${{ if ne(parameters.platform.pool, '') }}:
     pool: ${{ parameters.platform.pool }}
diff --git a/src/Build.UnitTests/BackEnd/MSBuild_Tests.cs b/src/Build.UnitTests/BackEnd/MSBuild_Tests.cs
index 9b0a1eae9bb..96e6ec8f609 100644
--- a/src/Build.UnitTests/BackEnd/MSBuild_Tests.cs
+++ b/src/Build.UnitTests/BackEnd/MSBuild_Tests.cs
@@ -412,7 +412,7 @@ public void LogErrorWhenBuildingVCProj()
         /// However, it's a situation where the project author doesn't have control over the
         /// property value and so he can't escape it himself.
         /// </summary>
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
         public void PropertyOverridesContainSemicolon()
         {
             ObjectModelHelpers.DeleteTempProjectDirectory();
diff --git a/src/Build.UnitTests/EscapingInProjects_Tests.cs b/src/Build.UnitTests/EscapingInProjects_Tests.cs
index 3df737c387a..cd7406fa9e3 100644
--- a/src/Build.UnitTests/EscapingInProjects_Tests.cs
+++ b/src/Build.UnitTests/EscapingInProjects_Tests.cs
@@ -957,7 +957,7 @@ public FullProjectsUsingMicrosoftCommonTargets(ITestOutputHelper output)
         /// <summary>
         ///     ESCAPING: Escaping in conditionals is broken.
         /// </summary>
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
         public void SemicolonInConfiguration()
         {
             ObjectModelHelpers.DeleteTempProjectDirectory();
@@ -1017,7 +1017,7 @@ public class Class1
         /// <summary>
         ///     ESCAPING: Escaping in conditionals is broken.
         /// </summary>
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
         public void SemicolonInConfiguration_UsingTaskHost()
         {
             string originalOverrideTaskHostVariable = Environment.GetEnvironmentVariable("MSBUILDFORCEALLTASKSOUTOFPROC");
@@ -1087,7 +1087,7 @@ public class Class1
         /// <summary>
         ///     ESCAPING: CopyBuildTarget target fails if the output assembly name contains a semicolon or single-quote
         /// </summary>
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
         public void SemicolonInAssemblyName()
         {
             ObjectModelHelpers.DeleteTempProjectDirectory();
@@ -1142,7 +1142,7 @@ public class Class1
         /// <summary>
         ///     ESCAPING: CopyBuildTarget target fails if the output assembly name contains a semicolon or single-quote
         /// </summary>
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
         public void SemicolonInAssemblyName_UsingTaskHost()
         {
             string originalOverrideTaskHostVariable = Environment.GetEnvironmentVariable("MSBUILDFORCEALLTASKSOUTOFPROC");
@@ -1207,7 +1207,7 @@ public class Class1
         /// <summary>
         ///     ESCAPING: Conversion Issue: Properties with $(xxx) as literals are not being converted correctly
         /// </summary>
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
         public void DollarSignInAssemblyName()
         {
             ObjectModelHelpers.DeleteTempProjectDirectory();
@@ -1262,7 +1262,7 @@ public class Class1
         /// <summary>
         ///     ESCAPING: Conversion Issue: Properties with $(xxx) as literals are not being converted correctly
         /// </summary>
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
         public void DollarSignInAssemblyName_UsingTaskHost()
         {
             string originalOverrideTaskHostVariable = Environment.GetEnvironmentVariable("MSBUILDFORCEALLTASKSOUTOFPROC");
@@ -1327,7 +1327,7 @@ public class Class1
         /// <summary>
         /// This is the case when one of the source code files in the project has a filename containing a semicolon.
         /// </summary>
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
         public void SemicolonInSourceCodeFilename()
         {
             ObjectModelHelpers.DeleteTempProjectDirectory();
@@ -1382,7 +1382,7 @@ public class Class1
         /// <summary>
         /// This is the case when one of the source code files in the project has a filename containing a semicolon.
         /// </summary>
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
         public void SemicolonInSourceCodeFilename_UsingTaskHost()
         {
             string originalOverrideTaskHostVariable = Environment.GetEnvironmentVariable("MSBUILDFORCEALLTASKSOUTOFPROC");
diff --git a/src/MSBuild/app.amd64.config b/src/MSBuild/app.amd64.config
index 86e98ea56df..e5e5e0e8bb0 100644
--- a/src/MSBuild/app.amd64.config
+++ b/src/MSBuild/app.amd64.config
@@ -49,8 +49,8 @@
 
         <dependentAssembly>
           <assemblyIdentity name="Microsoft.IO.Redist" culture="neutral" publicKeyToken="cc7b13ffcd2ddd51" />
-          <bindingRedirect oldVersion="0.0.0.0-99.9.9.9" newVersion="6.0.0.1" />
-          <codeBase version="6.0.0.1" href="..\Microsoft.IO.Redist.dll"/>
+          <bindingRedirect oldVersion="0.0.0.0-99.9.9.9" newVersion="6.0.0.0" />
+          <codeBase version="6.0.0.0" href="..\Microsoft.IO.Redist.dll"/>
         </dependentAssembly>
 
         <!-- Redirects for assemblies redistributed by MSBuild (in the .vsix). -->
@@ -68,8 +68,8 @@
         </dependentAssembly>
         <dependentAssembly>
           <assemblyIdentity name="Microsoft.Bcl.AsyncInterfaces" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
-          <bindingRedirect oldVersion="0.0.0.0-8.0.0.0" newVersion="8.0.0.0" />
-          <codeBase version="8.0.0.0" href="..\Microsoft.Bcl.AsyncInterfaces.dll"/>
+          <bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="7.0.0.0" />
+          <codeBase version="7.0.0.0" href="..\Microsoft.Bcl.AsyncInterfaces.dll"/>
         </dependentAssembly>
         <dependentAssembly>
           <assemblyIdentity name="Microsoft.NET.StringTools" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
@@ -94,8 +94,8 @@
         <!-- Pull plugins that reference SCI up to our version in case they depended on our copy of the older version -->
         <dependentAssembly>
           <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-          <bindingRedirect oldVersion="0.0.0.0-8.0.0.0" newVersion="8.0.0.0" />
-          <codeBase version="8.0.0.0" href="..\System.Collections.Immutable.dll"/>
+          <bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="7.0.0.0" />
+          <codeBase version="7.0.0.0" href="..\System.Collections.Immutable.dll"/>
         </dependentAssembly>
         <dependentAssembly>
           <assemblyIdentity name="System.Memory" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
@@ -129,13 +129,13 @@
         </dependentAssembly>
         <dependentAssembly>
           <assemblyIdentity name="System.Text.Encodings.Web" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
-          <bindingRedirect oldVersion="0.0.0.0-8.0.0.0" newVersion="8.0.0.0" />
-          <codeBase version="8.0.0.0" href="..\System.Text.Encodings.Web.dll"/>
+          <bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="7.0.0.0" />
+          <codeBase version="7.0.0.0" href="..\System.Text.Encodings.Web.dll"/>
         </dependentAssembly>
         <dependentAssembly>
           <assemblyIdentity name="System.Text.Json" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
-          <bindingRedirect oldVersion="0.0.0.0-8.0.0.5" newVersion="8.0.0.5" />
-          <codeBase version="8.0.0.5" href="..\System.Text.Json.dll"/>
+          <bindingRedirect oldVersion="0.0.0.0-7.0.0.3" newVersion="7.0.0.3" />
+          <codeBase version="7.0.0.3" href="..\System.Text.Json.dll"/>
         </dependentAssembly>
         <dependentAssembly>
           <assemblyIdentity name="System.Threading.Channels" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
@@ -229,4 +229,4 @@
         </projectImportSearchPaths>
       </toolset>
     </msbuildToolsets>
-  </configuration>
+  </configuration>
\ No newline at end of file
diff --git a/src/MSBuild/app.config b/src/MSBuild/app.config
index fcf5a7a524d..d8320fd2a47 100644
--- a/src/MSBuild/app.config
+++ b/src/MSBuild/app.config
@@ -41,11 +41,7 @@
         <!-- Redirects for assemblies redistributed by MSBuild (in the .vsix). -->
         <dependentAssembly>
           <assemblyIdentity name="Microsoft.Bcl.AsyncInterfaces" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
-          <bindingRedirect oldVersion="0.0.0.0-8.0.0.0" newVersion="8.0.0.0" />
-        </dependentAssembly>
-        <dependentAssembly>
-          <assemblyIdentity name="Microsoft.IO.Redist" culture="neutral" publicKeyToken="cc7b13ffcd2ddd51" />
-          <bindingRedirect oldVersion="0.0.0.0-6.0.0.1" newVersion="6.0.0.1" />
+          <bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="7.0.0.0" />
         </dependentAssembly>
         <dependentAssembly>
           <assemblyIdentity name="Microsoft.NET.StringTools" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
@@ -62,7 +58,7 @@
         <!-- Pull plugins that reference SCI up to our version in case they depended on our copy of the older version -->
         <dependentAssembly>
           <assemblyIdentity name="System.Collections.Immutable" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
-          <bindingRedirect oldVersion="0.0.0.0-8.0.0.0" newVersion="8.0.0.0" />
+          <bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="7.0.0.0" />
         </dependentAssembly>
         <dependentAssembly>
           <assemblyIdentity name="System.Memory" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
@@ -90,11 +86,11 @@
         </dependentAssembly>
         <dependentAssembly>
           <assemblyIdentity name="System.Text.Encodings.Web" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
-          <bindingRedirect oldVersion="0.0.0.0-8.0.0.0" newVersion="8.0.0.0" />
+          <bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="7.0.0.0" />
         </dependentAssembly>
         <dependentAssembly>
           <assemblyIdentity name="System.Text.Json" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
-          <bindingRedirect oldVersion="0.0.0.0-8.0.0.5" newVersion="8.0.0.5" />
+          <bindingRedirect oldVersion="0.0.0.0-7.0.0.3" newVersion="7.0.0.3" />
         </dependentAssembly>
         <dependentAssembly>
           <assemblyIdentity name="System.Threading.Tasks.Dataflow" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
@@ -182,4 +178,4 @@
         </projectImportSearchPaths>
       </toolset>
     </msbuildToolsets>
-  </configuration>
+  </configuration>
\ No newline at end of file
diff --git a/src/Tasks.UnitTests/MSBuild_Tests.cs b/src/Tasks.UnitTests/MSBuild_Tests.cs
index f8dcf89bbfe..78e99d99f1e 100644
--- a/src/Tasks.UnitTests/MSBuild_Tests.cs
+++ b/src/Tasks.UnitTests/MSBuild_Tests.cs
@@ -389,7 +389,7 @@ public void LogErrorWhenBuildingVCProj()
 #if RUNTIME_TYPE_NETCORE
         [Fact(Skip = "https://github.com/dotnet/msbuild/issues/259")]
 #else
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
 #endif
         public void PropertyOverridesContainSemicolon()
         {
diff --git a/src/Tasks.UnitTests/ResourceHandling/GenerateResourceOutOfProc_Tests.cs b/src/Tasks.UnitTests/ResourceHandling/GenerateResourceOutOfProc_Tests.cs
index 4172d013c78..6ccb9f0854f 100644
--- a/src/Tasks.UnitTests/ResourceHandling/GenerateResourceOutOfProc_Tests.cs
+++ b/src/Tasks.UnitTests/ResourceHandling/GenerateResourceOutOfProc_Tests.cs
@@ -2566,7 +2566,7 @@ public References(ITestOutputHelper output)
             _output = output;
         }
 
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
         // FIXME: mono: looks for csc.exe
         // https://github.com/dotnet/msbuild/issues/677
         public void DontLockP2PReferenceWhenResolvingSystemTypes()
@@ -2743,7 +2743,7 @@ public class Class1
         /// Assembly.LoadFile on that relative path, which fails (LoadFile requires an
         /// absolute path).  The fix was to use Assembly.LoadFrom instead.
         /// </summary>
-        [Fact]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
         // FIXME: mono: looks for csc.exe
         // https://github.com/dotnet/msbuild/issues/677
         public void ReferencedAssemblySpecifiedUsingRelativePath()
diff --git a/src/Tasks.UnitTests/ResourceHandling/GenerateResource_Tests.cs b/src/Tasks.UnitTests/ResourceHandling/GenerateResource_Tests.cs
index f704ef169a1..68a707586e2 100644
--- a/src/Tasks.UnitTests/ResourceHandling/GenerateResource_Tests.cs
+++ b/src/Tasks.UnitTests/ResourceHandling/GenerateResource_Tests.cs
@@ -3010,7 +3010,7 @@ public References(ITestOutputHelper output)
             _output = output;
         }
 
-        [WindowsFullFrameworkOnlyFact(additionalMessage: "Linked resources not supported on Core: https://github.com/dotnet/msbuild/issues/4094")]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
         public void DontLockP2PReferenceWhenResolvingSystemTypes()
         {
             // This WriteLine is a hack.  On a slow machine, the Tasks unittest fails because remoting
@@ -3186,7 +3186,7 @@ public class Class1
         /// which fails (LoadFile requires an absolute path).  The fix was to use
         /// Assembly.LoadFrom instead.
         /// </summary>
-        [WindowsFullFrameworkOnlyFact(additionalMessage: "Linked resources not supported on Core: https://github.com/dotnet/msbuild/issues/4094")]
+        [Fact(Skip = "https://github.com/dotnet/msbuild/issues/11888")]
         public void ReferencedAssemblySpecifiedUsingRelativePath()
         {
             // This WriteLine is a hack.  On a slow machine, the Tasks unittest fails because remoting
diff --git a/src/Tasks/DownloadFile.cs b/src/Tasks/DownloadFile.cs
index efe54f514ca..b606f5c5284 100644
--- a/src/Tasks/DownloadFile.cs
+++ b/src/Tasks/DownloadFile.cs
@@ -168,7 +168,7 @@ private async Task DownloadAsync(Uri uri, CancellationToken cancellationToken)
 #endif
                     }
 
-                    if (!TryGetFileName(response, out string filename))
+                    if (!TryGetFileName(uri, out string filename))
                     {
                         Log.LogErrorWithCodeFromResources("DownloadFile.ErrorUnknownFileName", SourceUrl, nameof(DestinationFileName));
                         return;
@@ -306,25 +306,24 @@ private static bool IsRetriable(Exception exception, out Exception actualExcepti
         /// <summary>
         /// Attempts to get the file name to use when downloading the file.
         /// </summary>
-        /// <param name="response">The <see cref="HttpResponseMessage"/> with information about the response.</param>
+        /// <param name="requestUri">The uri we sent request to.</param>
         /// <param name="filename">Receives the name of the file.</param>
         /// <returns><code>true</code> if a file name could be determined, otherwise <code>false</code>.</returns>
-        private bool TryGetFileName(HttpResponseMessage response, out string filename)
+        private bool TryGetFileName(Uri requestUri, out string filename)
         {
-            if (response == null)
+            if (requestUri == null)
             {
-                throw new ArgumentNullException(nameof(response));
+                throw new ArgumentNullException(nameof(requestUri));
             }
 
             // Not all URIs contain a file name so users will have to specify one
             // Example: http://www.download.com/file/1/
 
-            filename = !String.IsNullOrWhiteSpace(DestinationFileName?.ItemSpec)
+            filename = !string.IsNullOrWhiteSpace(DestinationFileName?.ItemSpec)
                 ? DestinationFileName.ItemSpec // Get the file name from what the user specified
-                : response.Content?.Headers?.ContentDisposition?.FileName // Attempt to get the file name from the content-disposition header value
-                  ?? Path.GetFileName(response.RequestMessage.RequestUri.LocalPath); // Otherwise attempt to get a file name from the URI
+                : Path.GetFileName(requestUri.LocalPath); // Otherwise attempt to get a file name from the URI
 
-            return !String.IsNullOrWhiteSpace(filename);
+            return !string.IsNullOrWhiteSpace(filename);
         }
 
 #if !NET6_0_OR_GREATER