update task to install .NET (#686)

* update task to install .NET

* update e2e test project to .net6.0

* update e2e .net version

Author: kaibocai

azure-pipelines-e2e-integration-tests.yml

@@ -70,15 +70,10 @@ jobs:
         java -version
       displayName: 'Check default java version'
 
-    - pwsh: |
-        Invoke-WebRequest 'https://raw.githubusercontent.com/dotnet/cli/master/scripts/obtain/dotnet-install.ps1' -OutFile 'dotnet-install.ps1'
-            ./dotnet-install.ps1 -InstallDir "$env:ProgramFiles/dotnet" -Version "6.0.100-rc.2.21505.57" -Channel 'release'
-      displayName: 'Install the .Net version used by the Core Tools for Windows'
-      condition: eq( variables['Agent.OS'], 'Windows_NT' )
-    - bash: |
-        curl -sSL https://raw.githubusercontent.com/dotnet/cli/master/scripts/obtain/dotnet-install.sh | bash /dev/stdin -v '6.0.100-rc.2.21505.57' -c 'release' --install-dir /usr/share/dotnet
-      displayName: 'Install the .Net version used by the Core Tools for Linux'
-      condition: eq( variables['Agent.OS'], 'Linux' )
+    - task: UseDotNet@2
+      displayName: 'Install .NET 6'
+      inputs:
+        version: 6.0.x
 
     - pwsh: |
           .\setup-tests-pipeline.ps1 -UseCoreToolsBuildFromIntegrationTests

azure-pipelines.yml

@@ -139,15 +139,10 @@ jobs:
       - pwsh: |
           .\package-pipeline.ps1 -buildNumber $(buildNumber)
         displayName: 'Executing build script'
-      - pwsh: |
-          Invoke-WebRequest 'https://raw.githubusercontent.com/dotnet/cli/master/scripts/obtain/dotnet-install.ps1' -OutFile 'dotnet-install.ps1'
-          ./dotnet-install.ps1 -InstallDir "$env:ProgramFiles/dotnet" -Version "6.0.100-rc.2.21505.57" -Channel 'release'
-        displayName: 'Install the .Net version used by the Core Tools for Windows'
-        condition: eq( variables['Agent.OS'], 'Windows_NT' )
-      - bash: |
-          curl -sSL https://raw.githubusercontent.com/dotnet/cli/master/scripts/obtain/dotnet-install.sh | bash /dev/stdin -v '6.0.100-rc.2.21505.57' -c 'release' --install-dir /usr/share/dotnet
-        displayName: 'Install the .Net version used by the Core Tools for Linux'
-        condition: eq( variables['Agent.OS'], 'Linux' )
+      - task: UseDotNet@2
+        displayName: 'Install .NET 6'
+        inputs:
+          version: 6.0.x
       - pwsh: | # Download JDK for later installation 
           Invoke-WebRequest $(JDK_DOWNLOAD_LINK) -O "$(JAVA_VERSION).tar.gz"
           $current = get-location | select -ExpandProperty Path
@@ -180,14 +175,12 @@ jobs:
       - pwsh: |
           $currDir =  Get-Location
           $Env:Path = $Env:Path+";$currDir/Azure.Functions.Cli"
-          ls $currDir/Azure.Functions.Cli
           func --version
         condition: eq( variables['Agent.OS'], 'Windows_NT' )
         displayName: 'Setup Core Tools - Windows'
       - bash: |
           chmod +x ./Azure.Functions.Cli/func
           chmod +x ./Azure.Functions.Cli/gozip
-          ls ./Azure.Functions.Cli
           export PATH=$PATH:./Azure.Functions.Cli
           func --version
         condition: eq( variables['Agent.OS'], 'Linux' )

endtoendtests/Azure.Functions.Java.Tests.E2E/Azure.Functions.Java.Tests.E2E/Azure.Functions.Java.Tests.E2E.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net6.0</TargetFramework>
 
     <IsPackable>false</IsPackable>
   </PropertyGroup>