Use property functions within MSBuild namespace, wherever possible

Replace 'HasTrailingSlash' conditional function with '[MSBuild]::EnsureTrailingSlash' property function
Replace '[System.IO.Path]::Combine' property function with '[MSBuild]::NormalizePath' and '[MSBuild]::NormalizeDirectory' property functions

src/Tasks/Microsoft.Common.CrossTargeting.targets

@@ -201,7 +201,7 @@ Copyright (C) Microsoft Corporation. All rights reserved.
   <PropertyGroup Condition="'$(ImportDirectoryBuildTargets)' == 'true' and '$(DirectoryBuildTargetsPath)' == ''">
     <_DirectoryBuildTargetsFile Condition="'$(_DirectoryBuildTargetsFile)' == ''">Directory.Build.targets</_DirectoryBuildTargetsFile>
     <_DirectoryBuildTargetsBasePath Condition="'$(_DirectoryBuildTargetsBasePath)' == ''">$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildProjectDirectory), '$(_DirectoryBuildTargetsFile)'))</_DirectoryBuildTargetsBasePath>
-    <DirectoryBuildTargetsPath Condition="'$(_DirectoryBuildTargetsBasePath)' != '' and '$(_DirectoryBuildTargetsFile)' != ''">$([System.IO.Path]::Combine('$(_DirectoryBuildTargetsBasePath)', '$(_DirectoryBuildTargetsFile)'))</DirectoryBuildTargetsPath>
+    <DirectoryBuildTargetsPath Condition="'$(_DirectoryBuildTargetsBasePath)' != '' and '$(_DirectoryBuildTargetsFile)' != ''">$([MSBuild]::NormalizePath('$(_DirectoryBuildTargetsBasePath)', '$(_DirectoryBuildTargetsFile)'))</DirectoryBuildTargetsPath>
   </PropertyGroup>
 
   <Import Project="$(DirectoryBuildTargetsPath)" Condition="'$(ImportDirectoryBuildTargets)' == 'true' and exists('$(DirectoryBuildTargetsPath)')"/>

src/Tasks/Microsoft.Common.CurrentVersion.targets

@@ -144,17 +144,15 @@ Copyright (C) Microsoft Corporation. All rights reserved.
     <Configuration Condition="'$(Configuration)' == ''">Debug</Configuration>
     <ConfigurationName Condition="'$(ConfigurationName)' == ''">$(Configuration)</ConfigurationName>
 
-    <BaseOutputPath Condition="'$(BaseOutputPath)' == ''">bin\</BaseOutputPath>
-    <BaseOutputPath Condition="!HasTrailingSlash('$(BaseOutputPath)')">$(BaseOutputPath)\</BaseOutputPath>
+    <BaseOutputPath>$([MSBuild]::EnsureTrailingSlash($([MSBuild]::ValueOrDefault('$(BaseOutputPath)', 'bin'))))</BaseOutputPath>
     <OutputPath Condition="'$(OutputPath)' == '' and '$(PlatformName)' == 'AnyCPU'">$(BaseOutputPath)$(Configuration)\</OutputPath>
     <OutputPath Condition="'$(OutputPath)' == '' and '$(PlatformName)' != 'AnyCPU'">$(BaseOutputPath)$(PlatformName)\$(Configuration)\</OutputPath>
-    <OutputPath Condition="!HasTrailingSlash('$(OutputPath)')">$(OutputPath)\</OutputPath>
+    <OutputPath>$([MSBuild]::EnsureTrailingSlash('$(OutputPath)'))</OutputPath>
 
-    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)' == ''">obj\</BaseIntermediateOutputPath>
-    <BaseIntermediateOutputPath Condition="!HasTrailingSlash('$(BaseIntermediateOutputPath)')">$(BaseIntermediateOutputPath)\</BaseIntermediateOutputPath>
+    <BaseIntermediateOutputPath>$([MSBuild]::EnsureTrailingSlash($([MSBuild]::ValueOrDefault('$(BaseIntermediateOutputPath)', 'obj'))))</BaseIntermediateOutputPath>
     <IntermediateOutputPath Condition="'$(IntermediateOutputPath)' == '' and '$(PlatformName)' == 'AnyCPU'">$(BaseIntermediateOutputPath)$(Configuration)\</IntermediateOutputPath>
     <IntermediateOutputPath Condition="'$(IntermediateOutputPath)' == '' and '$(PlatformName)' != 'AnyCPU'">$(BaseIntermediateOutputPath)$(PlatformName)\$(Configuration)\</IntermediateOutputPath>
-    <IntermediateOutputPath Condition="!HasTrailingSlash('$(IntermediateOutputPath)')">$(IntermediateOutputPath)\</IntermediateOutputPath>
+    <IntermediateOutputPath>$([MSBuild]::EnsureTrailingSlash('$(IntermediateOutputPath)'))</IntermediateOutputPath>
   </PropertyGroup>
 
   <PropertyGroup>
@@ -212,15 +210,14 @@ Copyright (C) Microsoft Corporation. All rights reserved.
     <!-- Required for enabling Team Build for packaging app package-generating projects -->
     <OutDirWasSpecified Condition=" '$(OutDir)'!='' and '$(OutDirWasSpecified)'=='' ">true</OutDirWasSpecified>
 
-    <OutDir Condition=" '$(OutDir)' == '' ">$(OutputPath)</OutDir>
     <!-- Example, bin\Debug\ -->
     <!-- Ensure OutDir has a trailing slash, so it can be concatenated -->
-    <OutDir Condition="'$(OutDir)' != '' and !HasTrailingSlash('$(OutDir)')">$(OutDir)\</OutDir>
+    <OutDir>$([MSBuild]::EnsureTrailingSlash($([MSBuild]::ValueOrDefault('$(OutDir)', '$(OutputPath)'))))</OutDir>
     <ProjectName Condition=" '$(ProjectName)' == '' ">$(MSBuildProjectName)</ProjectName>
     <!-- Example, MyProject -->
 
     <!-- For projects that generate app packages or ones that want a per-project output directory, update OutDir to include the project name -->
-    <OutDir Condition="'$(OutDir)' != '' and '$(OutDirWasSpecified)' == 'true' and (('$(WindowsAppContainer)' == 'true' and '$(GenerateProjectSpecificOutputFolder)' != 'false') or '$(GenerateProjectSpecificOutputFolder)' == 'true')">$(OutDir)$(ProjectName)\</OutDir>
+    <OutDir Condition="'$(OutDir)' != '' and '$(OutDirWasSpecified)' == 'true' and (('$(WindowsAppContainer)' == 'true' and '$(GenerateProjectSpecificOutputFolder)' != 'false') or '$(GenerateProjectSpecificOutputFolder)' == 'true')">$([MSBuild]::EnsureTrailingSlash('$(OutDir)$(ProjectName)'))</OutDir>
 
     <AssemblyName Condition=" '$(AssemblyName)'=='' ">$(MSBuildProjectName)</AssemblyName>
     <TargetName Condition="'$(TargetName)' == '' and '$(OutputType)' == 'winmdobj' and '$(RootNamespace)' != ''">$(RootNamespace)</TargetName>
@@ -306,7 +303,7 @@ Copyright (C) Microsoft Corporation. All rights reserved.
         Condition intentionally omitted on this one, because it causes problems
         when we pick up the value of an environment variable named TargetDir
         -->
-    <TargetDir Condition="'$(OutDir)' != ''">$([MSBuild]::Escape($([System.IO.Path]::GetFullPath(`$([System.IO.Path]::Combine(`$(MSBuildProjectDirectory)`, `$(OutDir)`))`))))</TargetDir>
+    <TargetDir Condition="'$(OutDir)' != ''">$([MSBuild]::NormalizeDirectory('$(MSBuildProjectDirectory)', '$(OutDir)'))</TargetDir>
 
     <!-- Example, C:\MyProjects\MyProject\bin\Debug\MyAssembly.dll -->
     <TargetPath Condition=" '$(TargetPath)' == '' ">$(TargetDir)$(TargetFileName)</TargetPath>
@@ -390,12 +387,12 @@ Copyright (C) Microsoft Corporation. All rights reserved.
 
   <PropertyGroup Condition="'$(_DebugSymbolsProduced)' == 'true' and '$(OutputType)' == 'winmdobj'">
     <WinMDExpOutputPdb Condition="'$(WinMDExpOutputPdb)' == ''">$(IntermediateOutputPath)$(TargetName).pdb</WinMDExpOutputPdb>
-    <_WinMDDebugSymbolsOutputPath>$([System.IO.Path]::Combine('$(OutDir)', $([System.IO.Path]::GetFileName('$(WinMDExpOutputPdb)'))))</_WinMDDebugSymbolsOutputPath>
+    <_WinMDDebugSymbolsOutputPath>$(OutDir)$([System.IO.Path]::GetFileName('$(WinMDExpOutputPdb)'))</_WinMDDebugSymbolsOutputPath>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(OutputType)' == 'winmdobj' and '$(DocumentationFile)'!=''">
     <WinMDOutputDocumentationFile Condition="'$(WinMDOutputDocumentationFile)' == ''">$(IntermediateOutputPath)$(TargetName).xml</WinMDOutputDocumentationFile>
-    <_WinMDDocFileOutputPath>$([System.IO.Path]::Combine('$(OutDir)', $([System.IO.Path]::GetFileName('$(WinMDOutputDocumentationFile)'))))</_WinMDDocFileOutputPath>
+    <_WinMDDocFileOutputPath>$(OutDir)$([System.IO.Path]::GetFileName('$(WinMDOutputDocumentationFile)'))</_WinMDDocFileOutputPath>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(WinMDExpOutputWindowsMetadataFilename)' != ''">
@@ -467,8 +464,7 @@ Copyright (C) Microsoft Corporation. All rights reserved.
 
   <!-- Output location for publish target. -->
   <PropertyGroup>
-    <PublishDir Condition="'$(PublishDir)' != '' and !HasTrailingSlash('$(PublishDir)')">$(PublishDir)\</PublishDir>
-    <PublishDir Condition="'$(PublishDir)'==''">$(OutputPath)app.publish\</PublishDir>
+    <PublishDir>$([MSBuild]::EnsureTrailingSlash($([MSBuild]::ValueOrDefault('$(PublishDir)', '$(OutputPath)app.publish'))))</PublishDir>
   </PropertyGroup>
 
   <!--
@@ -3376,7 +3372,7 @@ Copyright (C) Microsoft Corporation. All rights reserved.
   <PropertyGroup Condition="'$(TargetFrameworkMoniker)' != ''">
     <!-- Do not clean if we are going to default the path to the temp directory -->
     <TargetFrameworkMonikerAssemblyAttributesFileClean Condition="'$(TargetFrameworkMonikerAssemblyAttributesFileClean)' == '' and '$(TargetFrameworkMonikerAssemblyAttributesPath)' != ''">true</TargetFrameworkMonikerAssemblyAttributesFileClean>
-    <TargetFrameworkMonikerAssemblyAttributesPath Condition="'$(TargetFrameworkMonikerAssemblyAttributesPath)' == ''">$([System.IO.Path]::Combine('$(IntermediateOutputPath)','$(TargetFrameworkMoniker).AssemblyAttributes$(DefaultLanguageSourceExtension)'))</TargetFrameworkMonikerAssemblyAttributesPath>
+    <TargetFrameworkMonikerAssemblyAttributesPath Condition="'$(TargetFrameworkMonikerAssemblyAttributesPath)' == ''">$(IntermediateOutputPath)$(TargetFrameworkMoniker).AssemblyAttributes$(DefaultLanguageSourceExtension)</TargetFrameworkMonikerAssemblyAttributesPath>
   </PropertyGroup>
 
   <PropertyGroup>
@@ -4581,7 +4577,7 @@ Copyright (C) Microsoft Corporation. All rights reserved.
       <Output TaskParameter="DestinationFiles" ItemName="FinalWinmdExpArtifacts" />
     </Copy>
 
-    <Message Importance="High" Text="$(MSBuildProjectName) -&gt; $([System.IO.Path]::GetFullPath('$(_WindowsMetadataOutputPath)'))" Condition="'$(SkipCopyWinMDArtifact)' != 'true' and '$(_WindowsMetadataOutputPath)' != ''" />
+    <Message Importance="High" Text="$(MSBuildProjectName) -&gt; $([MSBuild]::NormalizePath('$(_WindowsMetadataOutputPath)'))" Condition="'$(SkipCopyWinMDArtifact)' != 'true' and '$(_WindowsMetadataOutputPath)' != ''" />
 
   </Target>
 

src/Tasks/Microsoft.Common.props

@@ -26,7 +26,7 @@ Copyright (C) Microsoft Corporation. All rights reserved.
   <PropertyGroup Condition="'$(ImportDirectoryBuildProps)' == 'true' and '$(DirectoryBuildPropsPath)' == ''">
     <_DirectoryBuildPropsFile Condition="'$(_DirectoryBuildPropsFile)' == ''">Directory.Build.props</_DirectoryBuildPropsFile>
     <_DirectoryBuildPropsBasePath Condition="'$(_DirectoryBuildPropsBasePath)' == ''">$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildProjectDirectory), '$(_DirectoryBuildPropsFile)'))</_DirectoryBuildPropsBasePath>
-    <DirectoryBuildPropsPath Condition="'$(_DirectoryBuildPropsBasePath)' != '' and '$(_DirectoryBuildPropsFile)' != ''">$([System.IO.Path]::Combine('$(_DirectoryBuildPropsBasePath)', '$(_DirectoryBuildPropsFile)'))</DirectoryBuildPropsPath>
+    <DirectoryBuildPropsPath Condition="'$(_DirectoryBuildPropsBasePath)' != '' and '$(_DirectoryBuildPropsFile)' != ''">$([MSBuild]::NormalizePath('$(_DirectoryBuildPropsBasePath)', '$(_DirectoryBuildPropsFile)'))</DirectoryBuildPropsPath>
   </PropertyGroup>
 
   <Import Project="$(DirectoryBuildPropsPath)" Condition="'$(ImportDirectoryBuildProps)' == 'true' and exists('$(DirectoryBuildPropsPath)')"/>
@@ -43,18 +43,16 @@ Copyright (C) Microsoft Corporation. All rights reserved.
             The declaration of $(BaseIntermediateOutputPath) had to be moved up from Microsoft.Common.CurrentVersion.targets
             in order for the $(MSBuildProjectExtensionsPath) to use it as a default.
         -->
-    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">obj\</BaseIntermediateOutputPath>
-    <BaseIntermediateOutputPath Condition="!HasTrailingSlash('$(BaseIntermediateOutputPath)')">$(BaseIntermediateOutputPath)\</BaseIntermediateOutputPath>
+    <BaseIntermediateOutputPath>$([MSBuild]::EnsureTrailingSlash($([MSBuild]::ValueOrDefault('$(BaseIntermediateOutputPath)', 'obj'))))</BaseIntermediateOutputPath>
     <_InitialBaseIntermediateOutputPath>$(BaseIntermediateOutputPath)</_InitialBaseIntermediateOutputPath>
 
-    <MSBuildProjectExtensionsPath Condition="'$(MSBuildProjectExtensionsPath)' == '' ">$(BaseIntermediateOutputPath)</MSBuildProjectExtensionsPath>
+    <MSBuildProjectExtensionsPath>$([MSBuild]::EnsureTrailingSlash($([MSBuild]::ValueOrDefault('$(MSBuildProjectExtensionsPath)', '$(BaseIntermediateOutputPath)'))))</MSBuildProjectExtensionsPath>
     <!--
         Import paths that are relative default to be relative to the importing file.  However, since MSBuildExtensionsPath
         defaults to BaseIntermediateOutputPath we expect it to be relative to the project directory.  So if the path is relative
         it needs to be made absolute based on the project directory.
       -->
-    <MSBuildProjectExtensionsPath Condition="'$([System.IO.Path]::IsPathRooted($(MSBuildProjectExtensionsPath)))' == 'false'">$([System.IO.Path]::Combine('$(MSBuildProjectDirectory)', '$(MSBuildProjectExtensionsPath)'))</MSBuildProjectExtensionsPath>
-    <MSBuildProjectExtensionsPath Condition="!HasTrailingSlash('$(MSBuildProjectExtensionsPath)')">$(MSBuildProjectExtensionsPath)\</MSBuildProjectExtensionsPath>
+    <MSBuildProjectExtensionsPath Condition="!$([System.IO.Path]::IsPathRooted('$(MSBuildProjectExtensionsPath)'))">$([MSBuild]::NormalizeDirectory('$(MSBuildProjectDirectory)', '$(MSBuildProjectExtensionsPath)'))</MSBuildProjectExtensionsPath>
     <ImportProjectExtensionProps Condition="'$(ImportProjectExtensionProps)' == ''">true</ImportProjectExtensionProps>
     <_InitialMSBuildProjectExtensionsPath Condition=" '$(ImportProjectExtensionProps)' == 'true' ">$(MSBuildProjectExtensionsPath)</_InitialMSBuildProjectExtensionsPath>
   </PropertyGroup>

src/Tasks/Microsoft.Common.targets

@@ -137,7 +137,7 @@ Copyright (C) Microsoft Corporation. All rights reserved.
   <PropertyGroup Condition="'$(ImportDirectoryBuildTargets)' == 'true' and '$(DirectoryBuildTargetsPath)' == ''">
     <_DirectoryBuildTargetsFile Condition="'$(_DirectoryBuildTargetsFile)' == ''">Directory.Build.targets</_DirectoryBuildTargetsFile>
     <_DirectoryBuildTargetsBasePath Condition="'$(_DirectoryBuildTargetsBasePath)' == ''">$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildProjectDirectory), '$(_DirectoryBuildTargetsFile)'))</_DirectoryBuildTargetsBasePath>
-    <DirectoryBuildTargetsPath Condition="'$(_DirectoryBuildTargetsBasePath)' != '' and '$(_DirectoryBuildTargetsFile)' != ''">$([System.IO.Path]::Combine('$(_DirectoryBuildTargetsBasePath)', '$(_DirectoryBuildTargetsFile)'))</DirectoryBuildTargetsPath>
+    <DirectoryBuildTargetsPath Condition="'$(_DirectoryBuildTargetsBasePath)' != '' and '$(_DirectoryBuildTargetsFile)' != ''">$([MSBuild]::NormalizePath('$(_DirectoryBuildTargetsBasePath)', '$(_DirectoryBuildTargetsFile)'))</DirectoryBuildTargetsPath>
   </PropertyGroup>
 
   <Import Project="$(DirectoryBuildTargetsPath)" Condition="'$(ImportDirectoryBuildTargets)' == 'true' and exists('$(DirectoryBuildTargetsPath)')"/>