Install SDK based on global.json only (don't hardcode in azdo pipelines yml)

azure-pipelines.yml

@@ -56,8 +56,6 @@ variables:
     value: .NETCore
   - name: VisualStudioDropName
     value: Products/$(System.TeamProject)/$(Build.Repository.Name)/$(Build.SourceBranchName)/$(Build.BuildNumber)
-  - name: DotNetSdkVersion
-    value: '6.0.100-preview.6.21355.2'
   - ${{ if and(eq(variables['System.TeamProject'], 'public'), eq(variables['Build.Reason'], 'PullRequest')) }}:
     - name: RunningAsPullRequest
       value: true
@@ -387,7 +385,8 @@ stages:
         #       displayName: install SDK
         #       inputs:
         #         packageType: sdk
-        #         version: $(DotNetSdkVersion)
+        #         useGlobalJson: true
+        #         includePreviewVersions: true
         #         workingDirectory: $(Build.SourcesDirectory)
         #         installationPath: $(Agent.ToolsDirectory)/dotnet
         #   - script: dotnet build .\FSharp.sln /bl:\"artifacts/log/$(_BuildConfig)/RegularBuild.binlog\"
@@ -411,9 +410,8 @@ stages:
             displayName: install SDK
             inputs:
               packageType: sdk
-              # We cannot use .NET version from global.json, since it tries to install all SDK version from all global.json files in the tree, and we use some fake versions for testing. 
-              useGlobalJson: false
-              version: $(DotNetSdkVersion)
+              useGlobalJson: true
+              includePreviewVersions: true
               workingDirectory: $(Build.SourcesDirectory)
               installationPath: $(Agent.ToolsDirectory)/dotnet
           - script: dotnet build ./FSharp.sln /bl:\"artifacts/log/$(_BuildConfig)/RegularBuild.binlog\"
@@ -437,10 +435,8 @@ stages:
             displayName: install SDK
             inputs:
               packageType: sdk
-              # We cannot use .NET version from global.json, since it tries to install all SDK version from all global.json files in the tree, and we use some fake versions for testing. 
-              useGlobalJson: false
-              version: $(DotNetSdkVersion)
-              performMultiLevelLookup: false
+              useGlobalJson: true
+              includePreviewVersions: true
               workingDirectory: $(Build.SourcesDirectory)
               installationPath: $(Agent.ToolsDirectory)/dotnet
           - script: dotnet build ./FSharp.sln /bl:\"artifacts/log/$(_BuildConfig)/RegularBuild.binlog\"

tests/walkthroughs/sdk-script-manual-tests/README.md.txt

@@ -1,4 +1,5 @@
-
+### NOTE
+Before running tests, `.global.json` files should be renamed to `global.json`, this is needed to not confuse UseDotNet task of Azure Pipelies when installing SDK.
 
 
 #### no warnings