Try build without manually installing .NET Core (#1956)

scripts/azure-pipelines.yml

@@ -42,8 +42,8 @@ variables:
   MONO_VERSION_LINUX: ''
   XCODE_VERSION: 12.4
   DOTNET_VERSION_PREVIOUS: 3.1.413
-  DOTNET_VERSION: 5.0.401
-  DOTNET_VERSION_PREVIEW: 6.0.200-preview.22063.5
+  DOTNET_VERSION: 6.0.200
+  DOTNET_VERSION_PREVIEW: ''
   DOTNET_WORKLOAD_SOURCE: 'https://aka.ms/dotnet/maui/6.0.200/preview.13.json'
   VS_VERSION_PREVIEW: 17/pre
   CONFIGURATION: 'Release'

scripts/azure-templates-build.yml

@@ -115,6 +115,7 @@ jobs:
           # install the bits needed for .NET 6 builds
           - pwsh: .\scripts\install-dotnet.ps1 -Version $env:DOTNET_VERSION_PREVIEW -InstallDir "$env:AGENT_TOOLSDIRECTORY/dotnet"
             displayName: Install the preview version of .NET Core
+            condition: ne(variables.DOTNET_VERSION_PREVIEW, '')
           - ${{ if endsWith(parameters.name, '_windows') }}:
             - ${{ if eq(parameters.installPreviewVs, 'true') }}:
               - pwsh: .\scripts\install-vs.ps1 -Version $env:VS_VERSION_PREVIEW

scripts/install-dotnet.ps1

@@ -1,6 +1,7 @@
 Param(
     [string] $Version,
-    [string] $InstallDir
+    [string] $InstallDir,
+    [string] $FeedUrl = "https://dotnetbuilds.blob.core.windows.net/public"
 )
 
 $ErrorActionPreference = 'Stop'
@@ -18,11 +19,11 @@ Invoke-WebRequest `
 
 Write-Host "Installing .NET $Version..."
 if ($IsMacOS) {
-  & sh dotnet-install.sh --version "$Version" --install-dir "$InstallDir" --verbose
+  & sh dotnet-install.sh --version "$Version" --install-dir "$InstallDir" --azure-feed "$FeedUrl" --verbose
 } elseif ($IsLinux) {
-  & bash dotnet-install.sh --version "$Version" --install-dir "$InstallDir" --verbose
+  & bash dotnet-install.sh --version "$Version" --install-dir "$InstallDir" --azure-feed "$FeedUrl" --verbose
 } else {
-  .\dotnet-install.ps1 -Version "$Version" -InstallDir "$InstallDir" -Verbose
+  .\dotnet-install.ps1 -Version "$Version" -InstallDir "$InstallDir" -AzureFeed "$FeedUrl" -Verbose
 }
 
 Write-Host "Installed .NET Versions:"