merge from master (#9)

merge from master

Co-authored-by: Nick Darvey <nickdarvey@outlook.com.au>
Co-authored-by: David Fowler <davidfowl@gmail.com>
Co-authored-by: Pranav K <prkrishn@hotmail.com>
Co-authored-by: Ryan Nowak <nowakra@gmail.com>
Co-authored-by: Justin Kotalik <jkotalik12@gmail.com>
Co-authored-by: Kristian Hellang <kristian@hellang.com>
Co-authored-by: Ajay Bhargav Baaskaran <ajaybhargavb@gmail.com>
Co-authored-by: null <42748379+dotnet-maestro[bot]@users.noreply.github.com>
Co-authored-by: Hao Kung <HaoK@users.noreply.github.com>
Co-authored-by: Doug Bunting <6431421+dougbu@users.noreply.github.com>
Co-authored-by: Chris Ross <Tratcher@Outlook.com>
Co-authored-by: Thomas Levesque <thomaslevesque@users.noreply.github.com>
Co-authored-by: Javier Calvarro Nelson <jacalvar@microsoft.com>
Co-authored-by: Mikael Mengistu <mikaelm12@users.noreply.github.com>
Co-authored-by: Stephen Halter <halter73@gmail.com>
Co-authored-by: Brennan <brecon@microsoft.com>
Co-authored-by: Steve Sanderson <SteveSandersonMS@users.noreply.github.com>
Co-authored-by: Andrew Stanton-Nurse <andrew@stanton-nurse.com>
Co-authored-by: Jacques Eloff <joeloff@users.noreply.github.com>
Co-authored-by: John Luo <johluo@microsoft.com>
Co-authored-by: huysentruitw <wouter_huysentruit@hotmail.com>
Co-authored-by: Ben Adams <thundercat@illyriad.co.uk>
Co-authored-by: Dylan Dmitri Gray <d.dylan.g@gmail.com>
Co-authored-by: Nate McMaster <natemcmaster@users.noreply.github.com>
Co-authored-by: dotnet-maestro <@dotnet-maestro>
Co-authored-by: Daniel Roth <daroth@microsoft.com>

.azure/pipelines/helix-test.yml

@@ -10,8 +10,8 @@ pr:
 jobs:
 - template: jobs/default-build.yml
   parameters:
-    jobName: Helix
-    jobDisplayName: 'Tests: Helix'
+    jobName: Helix_x64
+    jobDisplayName: 'Tests: Helix x64'
     agentOs: Windows
     timeoutInMinutes: 240
     steps:
@@ -25,3 +25,23 @@ jobs:
     - name: Helix_logs
       path: artifacts/log/
       publishOnError: true
+
+# Build Helix ARM64
+- template: jobs/default-build.yml
+  parameters:
+    jobName: Helix_arm64
+    jobDisplayName: "Tests: Helix ARM64"
+    agentOs: Linux
+    timeoutInMinutes: 240
+    steps:
+    - script: ./restore.sh -ci
+      displayName: Restore
+    - script: ./build.sh -ci --arch arm64 -test --no-build-nodejs -projects $(Build.SourcesDirectory)/eng/helix/helix.proj /p:IsHelixJob=true /p:BuildAllProjects=true /p:BuildNative=true -bl
+      displayName: Run build.sh helix arm64 target
+      env:
+        SYSTEM_ACCESSTOKEN: $(System.AccessToken) # We need to set this env var to publish helix results to Azure Dev Ops
+    installNodeJs: false
+    artifacts:
+    - name: Helix_arm64_logs
+      path: artifacts/logs/
+      publishOnError: true

.gitignore

@@ -39,4 +39,4 @@ modules/
 launchSettings.json
 msbuild.ProjectImports.zip
 StyleCop.Cache
-UpgradeLog.htm
+UpgradeLog.htm

Directory.Build.targets

@@ -25,7 +25,12 @@
     <PackageBrandingVersion>$(VersionPrefix)</PackageBrandingVersion>
     <PackageBrandingVersion Condition=" '$(VersionSuffix)' != '' ">$(PackageBrandingVersion) $(BrandingVersionSuffix.Trim())</PackageBrandingVersion>
 
+    <SiteExtensionSuffix>$(VersionSuffix.Replace('.','-'))</SiteExtensionSuffix>
+    <SiteExtensionPackageVersion>$(VersionPrefix)-$(SiteExtensionSuffix)</SiteExtensionPackageVersion>
+
+    <OriginalPackageVersion>$(Version)</OriginalPackageVersion>
     <PackageVersion Condition=" '$(PackageVersion)' == '' ">$(Version)</PackageVersion>
+    <PackageVersion Condition=" '$(NoSemVer20)' == 'true' ">$(SiteExtensionPackageVersion)</PackageVersion>
     <SharedFxVersion>$(PackageVersion)</SharedFxVersion>
 
     <TargetingPackVersion>$(TargetingPackVersionPrefix)</TargetingPackVersion>
@@ -93,6 +98,10 @@
     <BuildHelixPayload Condition="'$(BuildHelixPayload)' == '' AND '$(IsTestProject)' == 'true'">true</BuildHelixPayload>
   </PropertyGroup>
 
+  <ItemGroup Condition="'$(Language)' == 'C#' AND '$(IsReferenceAssemblyProject)' == 'true'">
+    <Compile Include="$(SharedSourceRoot)ReferenceAssemblyInfo.cs" LinkBase="Properties" />
+  </ItemGroup>
+
   <ItemGroup>
     <KnownFrameworkReference Update="Microsoft.NETCore.App">
       <!-- Always update the 'latest version', whether the repo is servicing or not. -->

NuGet.config

@@ -1,12 +1,7 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
     <clear />
-    <!--
-      Restore sources should be defined in eng/Versions.props.
-      The only allowed feeds here are dotnet-core and nuget.org, which is required to work around
-      https://github.com/Microsoft/msbuild/issues/2914
-    -->
     <add key="dotnet-core" value="https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json" />
     <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
   </packageSources>

eng/Signing.props

@@ -24,6 +24,8 @@
     <FileExtensionSignInfo Include=".nupkg" CertificateName="NuGet" />
     <FileExtensionSignInfo Include=".vsix" CertificateName="VsixSHA2" />
     <FileExtensionSignInfo Include=".zip" CertificateName="None" />
+    <FileExtensionSignInfo Include=".cab" CertificateName="None" />
+    <FileExtensionSignInfo Include=".msi" CertificateName="None" />
 
     <!--
       Use the PublicKeyToken of .NET assemblies to determine with authenticode cert to use.

eng/Workarounds.targets

@@ -31,7 +31,6 @@
     <WarnOnPackingNonPackableProject>false</WarnOnPackingNonPackableProject>
   </PropertyGroup>
 
-
   <!-- Workaround for https://github.com/dotnet/arcade/issues/204 -->
   <ItemGroup>
     <PackageReference Include="Internal.AspNetCore.BuildTasks" PrivateAssets="All" Version="$(InternalAspNetCoreBuildTasksPackageVersion)" IsImplicitlyDefined="true" />
@@ -58,4 +57,10 @@
     </KnownFrameworkReference>
   </ItemGroup>
 
+  <!-- Work around https://github.com/dotnet/cli/issues/11378. -->
+  <Target Name="_WorkaroundNetStandard" AfterTargets="ResolvePackageAssets">
+    <ItemGroup>
+      <TransitiveFrameworkReference Remove="NETStandard.Library" />
+    </ItemGroup>
+  </Target>
 </Project>

eng/helix/content/installnode.sh

@@ -9,16 +9,18 @@ if type -P "node" &>/dev/null; then
 fi
 
 node_version=$1
+arch=$2
 osname=`uname -s`
-echo $osname
 if [ "$osname" = "Darwin" ]; then
-   platformarch='darwin-x64'
+   platformarch="darwin-$arch"
 else
-   platformarch='linux-x64'
+   platformarch="linux-$arch"
 fi
+echo "PlatformArch: $platformarch"
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 output_dir="$DIR/node"
 url="http://nodejs.org/dist/v$node_version/node-v$node_version-$platformarch.tar.gz"
+echo "Downloading from: $url"
 tmp="$(mktemp -d -t install-node.XXXXXX)"
 trap "rm -rf $tmp" EXIT
 cd "$tmp"

eng/helix/content/runtests.cmd

@@ -7,17 +7,18 @@ set targetFrameworkIdentifier=%2
 set sdkVersion=%3
 set runtimeVersion=%4
 set helixQueue=%5
+set arch=%6
 
 set DOTNET_HOME=%HELIX_CORRELATION_PAYLOAD%\sdk
-set DOTNET_ROOT=%DOTNET_HOME%\x64
+set DOTNET_ROOT=%DOTNET_HOME%\%arch%
 set DOTNET_SKIP_FIRST_TIME_EXPERIENCE=1
 set DOTNET_MULTILEVEL_LOOKUP=0
 set DOTNET_CLI_HOME=%HELIX_CORRELATION_PAYLOAD%\home
 
 set PATH=%DOTNET_ROOT%;%PATH%;%HELIX_CORRELATION_PAYLOAD%\node\bin
 
-powershell.exe -NoProfile -ExecutionPolicy unrestricted -Command "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; &([scriptblock]::Create((Invoke-WebRequest -useb 'https://dot.net/v1/dotnet-install.ps1'))) -Architecture x64 -Version %sdkVersion% -InstallDir %DOTNET_ROOT%"
-powershell.exe -NoProfile -ExecutionPolicy unrestricted -Command "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; &([scriptblock]::Create((Invoke-WebRequest -useb 'https://dot.net/v1/dotnet-install.ps1'))) -Architecture x64 -Runtime dotnet -Version %runtimeVersion% -InstallDir %DOTNET_ROOT%"
+powershell.exe -NoProfile -ExecutionPolicy unrestricted -Command "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; &([scriptblock]::Create((Invoke-WebRequest -useb 'https://dot.net/v1/dotnet-install.ps1'))) -Architecture %arch% -Version %sdkVersion% -InstallDir %DOTNET_ROOT%"
+powershell.exe -NoProfile -ExecutionPolicy unrestricted -Command "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; &([scriptblock]::Create((Invoke-WebRequest -useb 'https://dot.net/v1/dotnet-install.ps1'))) -Architecture %arch% -Runtime dotnet -Version %runtimeVersion% -InstallDir %DOTNET_ROOT%"
 
 set HELIX=%helixQueue%
 

eng/helix/helix.proj

@@ -27,7 +27,7 @@
   <PropertyGroup Condition=" '$(ContinuousIntegrationBuild)' == 'true' ">
     <HelixType>ci</HelixType>
     <Creator>aspnetcore</Creator>
-    <HelixBuild>$(BUILD_BUILDNUMBER).$(SYSTEM_JOBATTEMPT)</HelixBuild>
+    <HelixBuild>$(BUILD_BUILDNUMBER).$(TargetArchitecture).$(SYSTEM_JOBATTEMPT)</HelixBuild>
     <WaitForWorkItemCompletion>true</WaitForWorkItemCompletion>
     <EnableAzurePipelinesReporter>true</EnableAzurePipelinesReporter>
     <FailOnMissionControlTestFailure>true</FailOnMissionControlTestFailure>

eng/targets/Helix.Common.props

@@ -10,7 +10,10 @@
     <HelixAvailablePlatform Include="Windows" />
     <HelixAvailablePlatform Include="OSX" />
     <HelixAvailablePlatform Include="Linux" />
-
+  </ItemGroup>
+
+    <!-- x64 queues -->
+  <ItemGroup Condition="'$(IsWindowsOnlyTest)' != 'true' AND '$(TargetArchitecture)' == 'x64'">
     <HelixAvailableTargetQueue Include="Windows.10.Amd64.ClientRS4.VS2017.Open" Platform="Windows" />
     <HelixAvailableTargetQueue Include="Windows.81.Amd64.Open" Platform="Windows" />
     <HelixAvailableTargetQueue Include="Windows.7.Amd64.Open" Platform="Windows" />
@@ -23,8 +26,16 @@
     <HelixAvailableTargetQueue Include="Debian.9.Amd64.Open" Platform="Linux" />
     <HelixAvailableTargetQueue Include="Redhat.7.Amd64.Open" Platform="Linux" />
     <HelixAvailableTargetQueue Include="(Fedora.28.Amd64.Open)Ubuntu.1604.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:fedora-28-helix-09ca40b-20190508143249" Platform="Linux" />
-
-    <!--  TODO: re-enable Debian.9.Arm64.Open and Ubuntu.1804.Arm64.Open    -->
+  </ItemGroup>
+
+  <ItemGroup Condition="'$(IsWindowsOnlyTest)' != 'true' AND '$(TargetArchitecture)' == 'arm64'">
+    <!-- arm64 queues -->
+    <HelixAvailableTargetQueue Include="(Debian.9.Arm64.Open)Ubuntu.1604.Arm64.Docker.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:debian-9-helix-arm64v8-0a0ebdd-20190312215438" Platform="Linux" />
+
+    <!-- Need to resolve permission issues on this docker queue
+    <HelixAvailableTargetQueue Include="(Alpine.38.Arm64)Ubuntu.1604.Arm64.Docker@mcr.microsoft.com/dotnet-buildtools/prereqs:alpine-3.8-helix-arm64v8-46e69dd-20190327215724" Platform="Linux" />
+    <HelixAvailableTargetQueue Include="(Ubuntu-1804.Arm64.Open)Ubuntu.1604.Arm64.Docker.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-18.04-helix-arm64v8-6f28fa9-20190606004102" Platform="Linux" />
+    -->
   </ItemGroup>
 
   <ItemGroup Condition="'$(IsWindowsOnlyTest)' == 'true'">

eng/targets/Helix.props

@@ -37,7 +37,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TestDependsOnNode)' == 'true' AND '$(IsWindowsHelixQueue)' == 'false'">
-    <HelixPreCommand Include="./installnode.sh $(NodeVersion)" />
+    <HelixPreCommand Include="./installnode.sh $(NodeVersion) $(TargetArchitecture)" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TestDependsOnNode)' == 'true' AND '$(IsWindowsHelixQueue)' == 'true'">

eng/targets/Helix.targets

@@ -49,8 +49,8 @@ Usage: dotnet msbuild /t:Helix src/MyTestProject.csproj
 
     <PropertyGroup>
       <BuildHelixPayload Condition="'@(_HelixApplicableTargetQueue->Count())' == '0'">false</BuildHelixPayload>
+      <BuildHelixPayload Condition="'$(TargetArchitecture)' == 'arm64' AND '$(SkipHelixArm)' == 'true'">false</BuildHelixPayload>
     </PropertyGroup>
-
   </Target>
 
   <Target Name="_PublishHelixArchive" DependsOnTargets="Publish" >
@@ -78,8 +78,8 @@ Usage: dotnet msbuild /t:Helix src/MyTestProject.csproj
         <TestAssembly>$(TargetFileName)</TestAssembly>
         <PreCommands>@(HelixPreCommand)</PreCommands>
         <PostCommands>@(HelixPostCommand)</PostCommands>
-        <Command Condition="$(IsWindowsHelixQueue)">call runtests.cmd $(TargetFileName) $(TargetFrameworkIdentifier) $(NETCoreSdkVersion) $(MicrosoftNETCoreAppRuntimeVersion) $(_HelixFriendlyNameTargetQueue)</Command>
-        <Command Condition="!$(IsWindowsHelixQueue)">./runtests.sh $(TargetFileName) $(NETCoreSdkVersion) $(MicrosoftNETCoreAppRuntimeVersion) $(_HelixFriendlyNameTargetQueue)</Command>
+        <Command Condition="$(IsWindowsHelixQueue)">call runtests.cmd $(TargetFileName) $(TargetFrameworkIdentifier) $(NETCoreSdkVersion) $(MicrosoftNETCoreAppRuntimeVersion) $(_HelixFriendlyNameTargetQueue) $(TargetArchitecture)</Command>
+        <Command Condition="!$(IsWindowsHelixQueue)">./runtests.sh $(TargetFileName) $(NETCoreSdkVersion) $(MicrosoftNETCoreAppRuntimeVersion) $(_HelixFriendlyNameTargetQueue) $(TargetArchitecture)</Command>
         <Timeout>$(HelixTimeout)</Timeout>
       </HelixWorkItem>
     </ItemGroup>

eng/targets/Npm.Common.targets

@@ -13,6 +13,11 @@
     <_BackupPackageJson>$(IntermediateOutputPath)$(MSBuildProjectName).package.json.bak</_BackupPackageJson>
   </PropertyGroup>
 
+  <ItemGroup>
+    <TSFiles Include="$(MSBuildProjectDirectory)\*\*.ts" />
+    <TSFiles Include="$(MSBuildProjectDirectory)\package.json" />
+  </ItemGroup>
+
   <Target Name="_CheckForInvalidConfiguration">
     <Error Text="Missing expected property: PackageId" Condition="'$(IsPackable)' != 'false' and '$(PackageId)' == ''" />
   </Target>
@@ -31,8 +36,14 @@
              BuildInParallel="true" />
   </Target>
 
-  <Target Name="Build" DependsOnTargets="PrepareForBuild;ResolveProjectReferences">
-    <Yarn Command="run build" Condition="'$(IsBuildable)' != 'false'" StandardOutputImportance="High" StandardErrorImportance="High" />
+  <Target Name="Build" DependsOnTargets="PrepareForBuild;ResolveProjectReferences;_Build" />
+
+  <Target Name="_Build"
+    Condition="'$(IsBuildable)' != 'false'"
+    Inputs="@(TSFiles)"
+    Outputs="$(BaseIntermediateOutputPath)\build-sentinel" >
+    <Yarn Command="run build" StandardOutputImportance="High" StandardErrorImportance="High" />
+    <WriteLinesToFile Overwrite="true" File="$(BaseIntermediateOutputPath)\build-sentinel" />
   </Target>
 
   <PropertyGroup>

eng/targets/Packaging.targets

@@ -14,6 +14,7 @@
       <_ProjectPathWithVersion Include="$(MSBuildProjectFullPath)">
         <PackageId>$(PackageId)</PackageId>
         <PackageVersion>$(PackageVersion)</PackageVersion>
+        <VersionSuffix>$(VersionSuffix)</VersionSuffix>
         <VersionVariableName>$(PackageId.Replace('.',''))PackageVersion</VersionVariableName>
       </_ProjectPathWithVersion>
     </ItemGroup>

eng/targets/ReferenceAssembly.targets

@@ -76,10 +76,6 @@
     </ItemGroup>
 
     <PropertyGroup>
-      <ProjectListFile>$(MSBuildThisFileDirectory)..\eng\ProjectReferences.props</ProjectListFile>
-      <RefsTargetFramework>$(TargetFrameworks)</RefsTargetFramework>
-      <RefsTargetFramework Condition="'$(RefsTargetFramework)' == ''">$(TargetFramework)</RefsTargetFramework>
-
       <ReferencesContent>
       <![CDATA[
   <ItemGroup Condition="'%24(TargetFramework)' == '$(TargetFramework)'">

eng/tools/RepoTasks/CreateFrameworkListFile.cs

@@ -23,6 +23,10 @@ public class CreateFrameworkListFile : Task
         [Required]
         public string TargetFile { get; set; }
 
+        public string ManagedRoot { get; set; } = "";
+
+        public string NativeRoot { get; set; } = "";
+
         /// <summary>
         /// Extra attributes to place on the root node.
         ///
@@ -46,7 +50,6 @@ public override bool Execute()
                 {
                     Item = item,
                     Filename = Path.GetFileName(item.ItemSpec),
-                    TargetPath = item.GetMetadata("TargetPath"),
                     AssemblyName = FileUtilities.GetAssemblyName(item.ItemSpec),
                     FileVersion = FileUtilities.GetFileVersion(item.ItemSpec),
                     IsNative = item.GetMetadata("IsNativeImage") == "true",
@@ -55,15 +58,14 @@ public override bool Execute()
                 .Where(f =>
                     !f.IsSymbolFile &&
                     (f.Filename.EndsWith(".dll", StringComparison.OrdinalIgnoreCase) || f.IsNative))
-                .OrderBy(f => f.TargetPath, StringComparer.Ordinal)
-                .ThenBy(f => f.Filename, StringComparer.Ordinal))
+                .OrderBy(f => f.Filename, StringComparer.Ordinal))
             {
                 var element = new XElement(
                     "File",
                     new XAttribute("Type", f.IsNative ? "Native" : "Managed"),
                     new XAttribute(
                         "Path",
-                        Path.Combine(f.TargetPath, f.Filename).Replace('\\', '/')));
+                        Path.Combine(f.IsNative ? NativeRoot : ManagedRoot, f.Filename).Replace('\\', '/')));
 
                 if (f.AssemblyName != null)
                 {

global.json

@@ -1,9 +1,9 @@
 {
   "sdk": {
-    "version": "3.0.100-preview5-011568"
+    "version": "3.0.100-preview6-012264"
   },
   "tools": {
-    "dotnet": "3.0.100-preview5-011568",
+    "dotnet": "3.0.100-preview6-012264",
     "runtimes": {
       "dotnet/x64": [
         "$(MicrosoftNETCoreAppRuntimeVersion)"

src/Antiforgery/test/DefaultAntiforgeryTokenGeneratorTest.cs

@@ -284,8 +284,7 @@ public void TryValidateTokenSet_CookieTokenMissing()
             var ex = Assert.Throws<ArgumentNullException>(
                 () => tokenProvider.TryValidateTokenSet(httpContext, null, fieldtoken, out message));
 
-            var trimmed = ex.Message.Substring(0, ex.Message.IndexOf(Environment.NewLine));
-            Assert.Equal(@"The required antiforgery cookie token must be provided.", trimmed);
+            Assert.StartsWith(@"The required antiforgery cookie token must be provided.", ex.Message);
         }
 
         [Fact]
@@ -307,8 +306,7 @@ public void TryValidateTokenSet_FieldTokenMissing()
             var ex = Assert.Throws<ArgumentNullException>(
                 () => tokenProvider.TryValidateTokenSet(httpContext, cookieToken, null, out message));
 
-            var trimmed = ex.Message.Substring(0, ex.Message.IndexOf(Environment.NewLine));
-            Assert.Equal("The required antiforgery request token must be provided.", trimmed);
+            Assert.StartsWith("The required antiforgery request token must be provided.", ex.Message);
         }
 
         [Fact]
@@ -625,4 +623,4 @@ public override string Name
             }
         }
     }
-}
+}

src/Azure/AzureAD/test/FunctionalTests/Microsoft.AspNetCore.Authentication.AzureAD.FunctionalTests.csproj

@@ -2,6 +2,8 @@
 
   <PropertyGroup>
     <TargetFramework>netcoreapp3.0</TargetFramework>
+    <!-- Test asset publishing not working on arm64 https://github.com/aspnet/AspNetCore/issues/11205 -->
+    <SkipHelixArm>true</SkipHelixArm>
   </PropertyGroup>
 
   <ItemGroup>

src/Components/Blazor/Blazor/src/Http/WebAssemblyHttpMessageHandler.cs

@@ -69,7 +69,7 @@ protected override async Task<HttpResponseMessage> SendAsync(
                 "Blazor._internal.http.sendAsync",
                 id,
                 request.Content == null ? null : await request.Content.ReadAsByteArrayAsync(),
-                JsonSerializer.ToString(options, JsonSerializerOptionsProvider.Options));
+                JsonSerializer.Serialize(options, JsonSerializerOptionsProvider.Options));
 
             return await tcs.Task;
         }
@@ -100,7 +100,7 @@ private static void ReceiveResponse(
             }
             else
             {
-                var responseDescriptor = JsonSerializer.Parse<ResponseDescriptor>(responseDescriptorJson, JsonSerializerOptionsProvider.Options);
+                var responseDescriptor = JsonSerializer.Deserialize<ResponseDescriptor>(responseDescriptorJson, JsonSerializerOptionsProvider.Options);
                 var responseContent = responseBodyData == null ? null : new ByteArrayContent(responseBodyData);
                 var responseMessage = responseDescriptor.ToResponseMessage(responseContent);
                 tcs.SetResult(responseMessage);

src/Components/Blazor/Build/src/Core/BootJsonWriter.cs

@@ -41,7 +41,7 @@ public static string GetBootJsonContent(string assemblyFileName, string entryPoi
                 assemblyReferences,
                 embeddedContent,
                 linkerEnabled);
-            return JsonSerializer.ToString(data, JsonSerializerOptionsProvider.Options);
+            return JsonSerializer.Serialize(data, JsonSerializerOptionsProvider.Options);
         }
 
         private static string GetAssemblyEntryPoint(string assemblyPath)

src/Components/Blazor/Build/src/ReferenceFromSource.props

@@ -28,7 +28,7 @@
   <PropertyGroup>
     <RunCommand>dotnet</RunCommand>
     <_BlazorCliLocation>$(MSBuildThisFileDirectory)../../DevServer/src/bin/$(Configuration)/netcoreapp3.0/blazor-devserver.dll</_BlazorCliLocation>
-    <RunArguments>exec &quot;$(_BlazorCliLocation)&quot; serve &quot;$(MSBuildProjectDirectory)/$(OutputPath)$(TargetFileName)&quot; $(AdditionalRunArguments)</RunArguments>
+    <RunArguments>exec &quot;$(_BlazorCliLocation)&quot; serve --applicationpath &quot;$(MSBuildProjectDirectory)/$(OutputPath)$(TargetFileName)&quot; $(AdditionalRunArguments)</RunArguments>
   </PropertyGroup>
 
   <ItemGroup>